diff --git a/llvm/test/Transforms/LICM/expr-reassociate.ll b/llvm/test/Transforms/LICM/expr-reassociate.ll new file mode 100644 --- /dev/null +++ b/llvm/test/Transforms/LICM/expr-reassociate.ll @@ -0,0 +1,974 @@ +; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 2 +; RUN: opt -passes='reassociate' -S < %s | FileCheck %s --check-prefix=REASSOCIATE_ONLY +; RUN: opt -passes='licm' -S < %s | FileCheck %s --check-prefix=LICM_ONLY +; RUN: opt -passes='reassociate,loop-mssa(licm)' -S < %s | FileCheck %s --check-prefix=LICM_AFTER_REASSOCIATE + +; +; A simple loop, should not get modified: +; +; int j; +; const double d1d = d1 * delta; +; +; for (j = 0; j <= i; j++) +; cells[j] = d1d * cells[j + 1]; +; + +define void @innermost_loop_1d_fast(i32 %i, double %d1, double %delta, ptr %cells) { +; REASSOCIATE_ONLY-LABEL: define void @innermost_loop_1d_fast +; REASSOCIATE_ONLY-SAME: (i32 [[I:%.*]], double [[D1:%.*]], double [[DELTA:%.*]], ptr [[CELLS:%.*]]) { +; REASSOCIATE_ONLY-NEXT: entry: +; REASSOCIATE_ONLY-NEXT: [[FMUL_D1:%.*]] = fmul fast double [[DELTA]], [[D1]] +; REASSOCIATE_ONLY-NEXT: br label [[FOR_COND:%.*]] +; REASSOCIATE_ONLY: for.cond: +; REASSOCIATE_ONLY-NEXT: [[J:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[ADD_J_1:%.*]], [[FOR_BODY:%.*]] ] +; REASSOCIATE_ONLY-NEXT: [[CMP_NOT:%.*]] = icmp sgt i32 [[J]], [[I]] +; REASSOCIATE_ONLY-NEXT: br i1 [[CMP_NOT]], label [[FOR_END:%.*]], label [[FOR_BODY]] +; REASSOCIATE_ONLY: for.body: +; REASSOCIATE_ONLY-NEXT: [[ADD_J_1]] = add nuw nsw i32 [[J]], 1 +; REASSOCIATE_ONLY-NEXT: [[IDXPROM_J_1:%.*]] = zext i32 [[ADD_J_1]] to i64 +; REASSOCIATE_ONLY-NEXT: [[ARRAYIDX_J_1:%.*]] = getelementptr inbounds double, ptr [[CELLS]], i64 [[IDXPROM_J_1]] +; REASSOCIATE_ONLY-NEXT: [[CELL_1:%.*]] = load double, ptr [[ARRAYIDX_J_1]], align 8 +; REASSOCIATE_ONLY-NEXT: [[FMUL_1:%.*]] = fmul fast double [[FMUL_D1]], [[CELL_1]] +; REASSOCIATE_ONLY-NEXT: [[IDXPROM_J:%.*]] = zext i32 [[J]] to i64 +; REASSOCIATE_ONLY-NEXT: [[ARRAYIDX_J:%.*]] = getelementptr inbounds double, ptr [[CELLS]], i64 [[IDXPROM_J]] +; REASSOCIATE_ONLY-NEXT: store double [[FMUL_1]], ptr [[ARRAYIDX_J]], align 8 +; REASSOCIATE_ONLY-NEXT: br label [[FOR_COND]] +; REASSOCIATE_ONLY: for.end: +; REASSOCIATE_ONLY-NEXT: ret void +; +; LICM_ONLY-LABEL: define void @innermost_loop_1d_fast +; LICM_ONLY-SAME: (i32 [[I:%.*]], double [[D1:%.*]], double [[DELTA:%.*]], ptr [[CELLS:%.*]]) { +; LICM_ONLY-NEXT: entry: +; LICM_ONLY-NEXT: [[FMUL_D1:%.*]] = fmul fast double [[D1]], [[DELTA]] +; LICM_ONLY-NEXT: br label [[FOR_COND:%.*]] +; LICM_ONLY: for.cond: +; LICM_ONLY-NEXT: [[J:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[ADD_J_1:%.*]], [[FOR_BODY:%.*]] ] +; LICM_ONLY-NEXT: [[CMP_NOT:%.*]] = icmp sgt i32 [[J]], [[I]] +; LICM_ONLY-NEXT: br i1 [[CMP_NOT]], label [[FOR_END:%.*]], label [[FOR_BODY]] +; LICM_ONLY: for.body: +; LICM_ONLY-NEXT: [[ADD_J_1]] = add nuw nsw i32 [[J]], 1 +; LICM_ONLY-NEXT: [[IDXPROM_J_1:%.*]] = zext i32 [[ADD_J_1]] to i64 +; LICM_ONLY-NEXT: [[ARRAYIDX_J_1:%.*]] = getelementptr inbounds double, ptr [[CELLS]], i64 [[IDXPROM_J_1]] +; LICM_ONLY-NEXT: [[CELL_1:%.*]] = load double, ptr [[ARRAYIDX_J_1]], align 8 +; LICM_ONLY-NEXT: [[FMUL_1:%.*]] = fmul fast double [[FMUL_D1]], [[CELL_1]] +; LICM_ONLY-NEXT: [[IDXPROM_J:%.*]] = zext i32 [[J]] to i64 +; LICM_ONLY-NEXT: [[ARRAYIDX_J:%.*]] = getelementptr inbounds double, ptr [[CELLS]], i64 [[IDXPROM_J]] +; LICM_ONLY-NEXT: store double [[FMUL_1]], ptr [[ARRAYIDX_J]], align 8 +; LICM_ONLY-NEXT: br label [[FOR_COND]] +; LICM_ONLY: for.end: +; LICM_ONLY-NEXT: ret void +; +; LICM_AFTER_REASSOCIATE-LABEL: define void @innermost_loop_1d_fast +; LICM_AFTER_REASSOCIATE-SAME: (i32 [[I:%.*]], double [[D1:%.*]], double [[DELTA:%.*]], ptr [[CELLS:%.*]]) { +; LICM_AFTER_REASSOCIATE-NEXT: entry: +; LICM_AFTER_REASSOCIATE-NEXT: [[FMUL_D1:%.*]] = fmul fast double [[DELTA]], [[D1]] +; LICM_AFTER_REASSOCIATE-NEXT: br label [[FOR_COND:%.*]] +; LICM_AFTER_REASSOCIATE: for.cond: +; LICM_AFTER_REASSOCIATE-NEXT: [[J:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[ADD_J_1:%.*]], [[FOR_BODY:%.*]] ] +; LICM_AFTER_REASSOCIATE-NEXT: [[CMP_NOT:%.*]] = icmp sgt i32 [[J]], [[I]] +; LICM_AFTER_REASSOCIATE-NEXT: br i1 [[CMP_NOT]], label [[FOR_END:%.*]], label [[FOR_BODY]] +; LICM_AFTER_REASSOCIATE: for.body: +; LICM_AFTER_REASSOCIATE-NEXT: [[ADD_J_1]] = add nuw nsw i32 [[J]], 1 +; LICM_AFTER_REASSOCIATE-NEXT: [[IDXPROM_J_1:%.*]] = zext i32 [[ADD_J_1]] to i64 +; LICM_AFTER_REASSOCIATE-NEXT: [[ARRAYIDX_J_1:%.*]] = getelementptr inbounds double, ptr [[CELLS]], i64 [[IDXPROM_J_1]] +; LICM_AFTER_REASSOCIATE-NEXT: [[CELL_1:%.*]] = load double, ptr [[ARRAYIDX_J_1]], align 8 +; LICM_AFTER_REASSOCIATE-NEXT: [[FMUL_1:%.*]] = fmul fast double [[FMUL_D1]], [[CELL_1]] +; LICM_AFTER_REASSOCIATE-NEXT: [[IDXPROM_J:%.*]] = zext i32 [[J]] to i64 +; LICM_AFTER_REASSOCIATE-NEXT: [[ARRAYIDX_J:%.*]] = getelementptr inbounds double, ptr [[CELLS]], i64 [[IDXPROM_J]] +; LICM_AFTER_REASSOCIATE-NEXT: store double [[FMUL_1]], ptr [[ARRAYIDX_J]], align 8 +; LICM_AFTER_REASSOCIATE-NEXT: br label [[FOR_COND]] +; LICM_AFTER_REASSOCIATE: for.end: +; LICM_AFTER_REASSOCIATE-NEXT: ret void +; +entry: + %fmul.d1 = fmul fast double %d1, %delta + br label %for.cond + +for.cond: + %j = phi i32 [ 0, %entry ], [ %add.j.1, %for.body ] + %cmp.not = icmp sgt i32 %j, %i + br i1 %cmp.not, label %for.end, label %for.body + +for.body: + %add.j.1 = add nuw nsw i32 %j, 1 + %idxprom.j.1 = zext i32 %add.j.1 to i64 + %arrayidx.j.1 = getelementptr inbounds double, ptr %cells, i64 %idxprom.j.1 + %cell.1 = load double, ptr %arrayidx.j.1, align 8 + %fmul.1 = fmul fast double %fmul.d1, %cell.1 + %idxprom.j = zext i32 %j to i64 + %arrayidx.j = getelementptr inbounds double, ptr %cells, i64 %idxprom.j + store double %fmul.1, ptr %arrayidx.j, align 8 + br label %for.cond + +for.end: + ret void +} + +; +; A simple loop: +; +; int j; +; +; for (j = 0; j <= i; j++) +; cells[j] = d1 * cells[j + 1] * delta; +; +; ...should be transformed by the LICM pass into this: +; +; int j; +; const double d1d = d1 * delta; +; +; for (j = 0; j <= i; j++) +; cells[j] = d1d * cells[j + 1]; +; + +define void @innermost_loop_1d_shouldhoist_fast(i32 %i, double %d1, double %delta, ptr %cells) { +; REASSOCIATE_ONLY-LABEL: define void @innermost_loop_1d_shouldhoist_fast +; REASSOCIATE_ONLY-SAME: (i32 [[I:%.*]], double [[D1:%.*]], double [[DELTA:%.*]], ptr [[CELLS:%.*]]) { +; REASSOCIATE_ONLY-NEXT: entry: +; REASSOCIATE_ONLY-NEXT: br label [[FOR_COND:%.*]] +; REASSOCIATE_ONLY: for.cond: +; REASSOCIATE_ONLY-NEXT: [[J:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[ADD_J_1:%.*]], [[FOR_BODY:%.*]] ] +; REASSOCIATE_ONLY-NEXT: [[CMP_NOT:%.*]] = icmp sgt i32 [[J]], [[I]] +; REASSOCIATE_ONLY-NEXT: br i1 [[CMP_NOT]], label [[FOR_END:%.*]], label [[FOR_BODY]] +; REASSOCIATE_ONLY: for.body: +; REASSOCIATE_ONLY-NEXT: [[ADD_J_1]] = add nuw nsw i32 [[J]], 1 +; REASSOCIATE_ONLY-NEXT: [[IDXPROM_J_1:%.*]] = zext i32 [[ADD_J_1]] to i64 +; REASSOCIATE_ONLY-NEXT: [[ARRAYIDX_J_1:%.*]] = getelementptr inbounds double, ptr [[CELLS]], i64 [[IDXPROM_J_1]] +; REASSOCIATE_ONLY-NEXT: [[CELL_1:%.*]] = load double, ptr [[ARRAYIDX_J_1]], align 8 +; REASSOCIATE_ONLY-NEXT: [[FMUL_1:%.*]] = fmul fast double [[DELTA]], [[D1]] +; REASSOCIATE_ONLY-NEXT: [[FMUL_2:%.*]] = fmul fast double [[FMUL_1]], [[CELL_1]] +; REASSOCIATE_ONLY-NEXT: [[IDXPROM_J:%.*]] = zext i32 [[J]] to i64 +; REASSOCIATE_ONLY-NEXT: [[ARRAYIDX_J:%.*]] = getelementptr inbounds double, ptr [[CELLS]], i64 [[IDXPROM_J]] +; REASSOCIATE_ONLY-NEXT: store double [[FMUL_2]], ptr [[ARRAYIDX_J]], align 8 +; REASSOCIATE_ONLY-NEXT: br label [[FOR_COND]] +; REASSOCIATE_ONLY: for.end: +; REASSOCIATE_ONLY-NEXT: ret void +; +; LICM_ONLY-LABEL: define void @innermost_loop_1d_shouldhoist_fast +; LICM_ONLY-SAME: (i32 [[I:%.*]], double [[D1:%.*]], double [[DELTA:%.*]], ptr [[CELLS:%.*]]) { +; LICM_ONLY-NEXT: entry: +; LICM_ONLY-NEXT: br label [[FOR_COND:%.*]] +; LICM_ONLY: for.cond: +; LICM_ONLY-NEXT: [[J:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[ADD_J_1:%.*]], [[FOR_BODY:%.*]] ] +; LICM_ONLY-NEXT: [[CMP_NOT:%.*]] = icmp sgt i32 [[J]], [[I]] +; LICM_ONLY-NEXT: br i1 [[CMP_NOT]], label [[FOR_END:%.*]], label [[FOR_BODY]] +; LICM_ONLY: for.body: +; LICM_ONLY-NEXT: [[ADD_J_1]] = add nuw nsw i32 [[J]], 1 +; LICM_ONLY-NEXT: [[IDXPROM_J_1:%.*]] = zext i32 [[ADD_J_1]] to i64 +; LICM_ONLY-NEXT: [[ARRAYIDX_J_1:%.*]] = getelementptr inbounds double, ptr [[CELLS]], i64 [[IDXPROM_J_1]] +; LICM_ONLY-NEXT: [[CELL_1:%.*]] = load double, ptr [[ARRAYIDX_J_1]], align 8 +; LICM_ONLY-NEXT: [[FMUL_1:%.*]] = fmul fast double [[D1]], [[CELL_1]] +; LICM_ONLY-NEXT: [[FMUL_2:%.*]] = fmul fast double [[FMUL_1]], [[DELTA]] +; LICM_ONLY-NEXT: [[IDXPROM_J:%.*]] = zext i32 [[J]] to i64 +; LICM_ONLY-NEXT: [[ARRAYIDX_J:%.*]] = getelementptr inbounds double, ptr [[CELLS]], i64 [[IDXPROM_J]] +; LICM_ONLY-NEXT: store double [[FMUL_2]], ptr [[ARRAYIDX_J]], align 8 +; LICM_ONLY-NEXT: br label [[FOR_COND]] +; LICM_ONLY: for.end: +; LICM_ONLY-NEXT: ret void +; +; LICM_AFTER_REASSOCIATE-LABEL: define void @innermost_loop_1d_shouldhoist_fast +; LICM_AFTER_REASSOCIATE-SAME: (i32 [[I:%.*]], double [[D1:%.*]], double [[DELTA:%.*]], ptr [[CELLS:%.*]]) { +; LICM_AFTER_REASSOCIATE-NEXT: entry: +; LICM_AFTER_REASSOCIATE-NEXT: [[FMUL_1:%.*]] = fmul fast double [[DELTA]], [[D1]] +; LICM_AFTER_REASSOCIATE-NEXT: br label [[FOR_COND:%.*]] +; LICM_AFTER_REASSOCIATE: for.cond: +; LICM_AFTER_REASSOCIATE-NEXT: [[J:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[ADD_J_1:%.*]], [[FOR_BODY:%.*]] ] +; LICM_AFTER_REASSOCIATE-NEXT: [[CMP_NOT:%.*]] = icmp sgt i32 [[J]], [[I]] +; LICM_AFTER_REASSOCIATE-NEXT: br i1 [[CMP_NOT]], label [[FOR_END:%.*]], label [[FOR_BODY]] +; LICM_AFTER_REASSOCIATE: for.body: +; LICM_AFTER_REASSOCIATE-NEXT: [[ADD_J_1]] = add nuw nsw i32 [[J]], 1 +; LICM_AFTER_REASSOCIATE-NEXT: [[IDXPROM_J_1:%.*]] = zext i32 [[ADD_J_1]] to i64 +; LICM_AFTER_REASSOCIATE-NEXT: [[ARRAYIDX_J_1:%.*]] = getelementptr inbounds double, ptr [[CELLS]], i64 [[IDXPROM_J_1]] +; LICM_AFTER_REASSOCIATE-NEXT: [[CELL_1:%.*]] = load double, ptr [[ARRAYIDX_J_1]], align 8 +; LICM_AFTER_REASSOCIATE-NEXT: [[FMUL_2:%.*]] = fmul fast double [[FMUL_1]], [[CELL_1]] +; LICM_AFTER_REASSOCIATE-NEXT: [[IDXPROM_J:%.*]] = zext i32 [[J]] to i64 +; LICM_AFTER_REASSOCIATE-NEXT: [[ARRAYIDX_J:%.*]] = getelementptr inbounds double, ptr [[CELLS]], i64 [[IDXPROM_J]] +; LICM_AFTER_REASSOCIATE-NEXT: store double [[FMUL_2]], ptr [[ARRAYIDX_J]], align 8 +; LICM_AFTER_REASSOCIATE-NEXT: br label [[FOR_COND]] +; LICM_AFTER_REASSOCIATE: for.end: +; LICM_AFTER_REASSOCIATE-NEXT: ret void +; +entry: + br label %for.cond + +for.cond: + %j = phi i32 [ 0, %entry ], [ %add.j.1, %for.body ] + %cmp.not = icmp sgt i32 %j, %i + br i1 %cmp.not, label %for.end, label %for.body + +for.body: + %add.j.1 = add nuw nsw i32 %j, 1 + %idxprom.j.1 = zext i32 %add.j.1 to i64 + %arrayidx.j.1 = getelementptr inbounds double, ptr %cells, i64 %idxprom.j.1 + %cell.1 = load double, ptr %arrayidx.j.1, align 8 + %fmul.1 = fmul fast double %d1, %cell.1 + %fmul.2 = fmul fast double %fmul.1, %delta + %idxprom.j = zext i32 %j to i64 + %arrayidx.j = getelementptr inbounds double, ptr %cells, i64 %idxprom.j + store double %fmul.2, ptr %arrayidx.j, align 8 + br label %for.cond + +for.end: + ret void +} + +; +; The following loop will be modified by the 'Reassociate expressions' pass, +; +; int j; +; const double d1d = d1 * delta; +; const double d2d = d2 * delta; +; +; for (j = 0; j <= i; j++) +; cells[j] = d1d * cells[j + 1] + d2d * cells[j]; +; +; ...into this: +; +; int j; +; +; for (j = 0; j <= i; j++) +; cells[j] = (d1 * cells[j + 1] + d2 * cells[j]) * delta; +; +; We expect the LICM pass to undo this transformation. +; + +define void @innermost_loop_2d_fast(i32 %i, double %d1, double %d2, double %delta, ptr %cells) { +; REASSOCIATE_ONLY-LABEL: define void @innermost_loop_2d_fast +; REASSOCIATE_ONLY-SAME: (i32 [[I:%.*]], double [[D1:%.*]], double [[D2:%.*]], double [[DELTA:%.*]], ptr [[CELLS:%.*]]) { +; REASSOCIATE_ONLY-NEXT: entry: +; REASSOCIATE_ONLY-NEXT: br label [[FOR_COND:%.*]] +; REASSOCIATE_ONLY: for.cond: +; REASSOCIATE_ONLY-NEXT: [[J:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[ADD_J_1:%.*]], [[FOR_BODY:%.*]] ] +; REASSOCIATE_ONLY-NEXT: [[CMP_NOT:%.*]] = icmp sgt i32 [[J]], [[I]] +; REASSOCIATE_ONLY-NEXT: br i1 [[CMP_NOT]], label [[FOR_END:%.*]], label [[FOR_BODY]] +; REASSOCIATE_ONLY: for.body: +; REASSOCIATE_ONLY-NEXT: [[ADD_J_1]] = add nuw nsw i32 [[J]], 1 +; REASSOCIATE_ONLY-NEXT: [[IDXPROM_J_1:%.*]] = zext i32 [[ADD_J_1]] to i64 +; REASSOCIATE_ONLY-NEXT: [[ARRAYIDX_J_1:%.*]] = getelementptr inbounds double, ptr [[CELLS]], i64 [[IDXPROM_J_1]] +; REASSOCIATE_ONLY-NEXT: [[CELL_1:%.*]] = load double, ptr [[ARRAYIDX_J_1]], align 8 +; REASSOCIATE_ONLY-NEXT: [[FMUL_1:%.*]] = fmul fast double [[CELL_1]], [[D1]] +; REASSOCIATE_ONLY-NEXT: [[IDXPROM_J:%.*]] = zext i32 [[J]] to i64 +; REASSOCIATE_ONLY-NEXT: [[ARRAYIDX_J:%.*]] = getelementptr inbounds double, ptr [[CELLS]], i64 [[IDXPROM_J]] +; REASSOCIATE_ONLY-NEXT: [[CELL_2:%.*]] = load double, ptr [[ARRAYIDX_J]], align 8 +; REASSOCIATE_ONLY-NEXT: [[FMUL_2:%.*]] = fmul fast double [[CELL_2]], [[D2]] +; REASSOCIATE_ONLY-NEXT: [[REASS_ADD:%.*]] = fadd fast double [[FMUL_2]], [[FMUL_1]] +; REASSOCIATE_ONLY-NEXT: [[REASS_MUL:%.*]] = fmul fast double [[REASS_ADD]], [[DELTA]] +; REASSOCIATE_ONLY-NEXT: store double [[REASS_MUL]], ptr [[ARRAYIDX_J]], align 8 +; REASSOCIATE_ONLY-NEXT: br label [[FOR_COND]] +; REASSOCIATE_ONLY: for.end: +; REASSOCIATE_ONLY-NEXT: ret void +; +; LICM_ONLY-LABEL: define void @innermost_loop_2d_fast +; LICM_ONLY-SAME: (i32 [[I:%.*]], double [[D1:%.*]], double [[D2:%.*]], double [[DELTA:%.*]], ptr [[CELLS:%.*]]) { +; LICM_ONLY-NEXT: entry: +; LICM_ONLY-NEXT: [[FMUL_D1:%.*]] = fmul fast double [[D1]], [[DELTA]] +; LICM_ONLY-NEXT: [[FMUL_D2:%.*]] = fmul fast double [[D2]], [[DELTA]] +; LICM_ONLY-NEXT: br label [[FOR_COND:%.*]] +; LICM_ONLY: for.cond: +; LICM_ONLY-NEXT: [[J:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[ADD_J_1:%.*]], [[FOR_BODY:%.*]] ] +; LICM_ONLY-NEXT: [[CMP_NOT:%.*]] = icmp sgt i32 [[J]], [[I]] +; LICM_ONLY-NEXT: br i1 [[CMP_NOT]], label [[FOR_END:%.*]], label [[FOR_BODY]] +; LICM_ONLY: for.body: +; LICM_ONLY-NEXT: [[ADD_J_1]] = add nuw nsw i32 [[J]], 1 +; LICM_ONLY-NEXT: [[IDXPROM_J_1:%.*]] = zext i32 [[ADD_J_1]] to i64 +; LICM_ONLY-NEXT: [[ARRAYIDX_J_1:%.*]] = getelementptr inbounds double, ptr [[CELLS]], i64 [[IDXPROM_J_1]] +; LICM_ONLY-NEXT: [[CELL_1:%.*]] = load double, ptr [[ARRAYIDX_J_1]], align 8 +; LICM_ONLY-NEXT: [[FMUL_1:%.*]] = fmul fast double [[FMUL_D1]], [[CELL_1]] +; LICM_ONLY-NEXT: [[IDXPROM_J:%.*]] = zext i32 [[J]] to i64 +; LICM_ONLY-NEXT: [[ARRAYIDX_J:%.*]] = getelementptr inbounds double, ptr [[CELLS]], i64 [[IDXPROM_J]] +; LICM_ONLY-NEXT: [[CELL_2:%.*]] = load double, ptr [[ARRAYIDX_J]], align 8 +; LICM_ONLY-NEXT: [[FMUL_2:%.*]] = fmul fast double [[FMUL_D2]], [[CELL_2]] +; LICM_ONLY-NEXT: [[FADD_1:%.*]] = fadd fast double [[FMUL_1]], [[FMUL_2]] +; LICM_ONLY-NEXT: store double [[FADD_1]], ptr [[ARRAYIDX_J]], align 8 +; LICM_ONLY-NEXT: br label [[FOR_COND]] +; LICM_ONLY: for.end: +; LICM_ONLY-NEXT: ret void +; +; LICM_AFTER_REASSOCIATE-LABEL: define void @innermost_loop_2d_fast +; LICM_AFTER_REASSOCIATE-SAME: (i32 [[I:%.*]], double [[D1:%.*]], double [[D2:%.*]], double [[DELTA:%.*]], ptr [[CELLS:%.*]]) { +; LICM_AFTER_REASSOCIATE-NEXT: entry: +; LICM_AFTER_REASSOCIATE-NEXT: br label [[FOR_COND:%.*]] +; LICM_AFTER_REASSOCIATE: for.cond: +; LICM_AFTER_REASSOCIATE-NEXT: [[J:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[ADD_J_1:%.*]], [[FOR_BODY:%.*]] ] +; LICM_AFTER_REASSOCIATE-NEXT: [[CMP_NOT:%.*]] = icmp sgt i32 [[J]], [[I]] +; LICM_AFTER_REASSOCIATE-NEXT: br i1 [[CMP_NOT]], label [[FOR_END:%.*]], label [[FOR_BODY]] +; LICM_AFTER_REASSOCIATE: for.body: +; LICM_AFTER_REASSOCIATE-NEXT: [[ADD_J_1]] = add nuw nsw i32 [[J]], 1 +; LICM_AFTER_REASSOCIATE-NEXT: [[IDXPROM_J_1:%.*]] = zext i32 [[ADD_J_1]] to i64 +; LICM_AFTER_REASSOCIATE-NEXT: [[ARRAYIDX_J_1:%.*]] = getelementptr inbounds double, ptr [[CELLS]], i64 [[IDXPROM_J_1]] +; LICM_AFTER_REASSOCIATE-NEXT: [[CELL_1:%.*]] = load double, ptr [[ARRAYIDX_J_1]], align 8 +; LICM_AFTER_REASSOCIATE-NEXT: [[FMUL_1:%.*]] = fmul fast double [[CELL_1]], [[D1]] +; LICM_AFTER_REASSOCIATE-NEXT: [[IDXPROM_J:%.*]] = zext i32 [[J]] to i64 +; LICM_AFTER_REASSOCIATE-NEXT: [[ARRAYIDX_J:%.*]] = getelementptr inbounds double, ptr [[CELLS]], i64 [[IDXPROM_J]] +; LICM_AFTER_REASSOCIATE-NEXT: [[CELL_2:%.*]] = load double, ptr [[ARRAYIDX_J]], align 8 +; LICM_AFTER_REASSOCIATE-NEXT: [[FMUL_2:%.*]] = fmul fast double [[CELL_2]], [[D2]] +; LICM_AFTER_REASSOCIATE-NEXT: [[REASS_ADD:%.*]] = fadd fast double [[FMUL_2]], [[FMUL_1]] +; LICM_AFTER_REASSOCIATE-NEXT: [[REASS_MUL:%.*]] = fmul fast double [[REASS_ADD]], [[DELTA]] +; LICM_AFTER_REASSOCIATE-NEXT: store double [[REASS_MUL]], ptr [[ARRAYIDX_J]], align 8 +; LICM_AFTER_REASSOCIATE-NEXT: br label [[FOR_COND]] +; LICM_AFTER_REASSOCIATE: for.end: +; LICM_AFTER_REASSOCIATE-NEXT: ret void +; +entry: + %fmul.d1 = fmul fast double %d1, %delta + %fmul.d2 = fmul fast double %d2, %delta + br label %for.cond + +for.cond: + %j = phi i32 [ 0, %entry ], [ %add.j.1, %for.body ] + %cmp.not = icmp sgt i32 %j, %i + br i1 %cmp.not, label %for.end, label %for.body + +for.body: + %add.j.1 = add nuw nsw i32 %j, 1 + %idxprom.j.1 = zext i32 %add.j.1 to i64 + %arrayidx.j.1 = getelementptr inbounds double, ptr %cells, i64 %idxprom.j.1 + %cell.1 = load double, ptr %arrayidx.j.1, align 8 + %fmul.1 = fmul fast double %fmul.d1, %cell.1 + %idxprom.j = zext i32 %j to i64 + %arrayidx.j = getelementptr inbounds double, ptr %cells, i64 %idxprom.j + %cell.2 = load double, ptr %arrayidx.j, align 8 + %fmul.2 = fmul fast double %fmul.d2, %cell.2 + %fadd.1 = fadd fast double %fmul.1, %fmul.2 + store double %fadd.1, ptr %arrayidx.j, align 8 + br label %for.cond + +for.end: + ret void +} + +; +; The following loop will be modified by the 'Reassociate expressions' pass, +; +; int j; +; const double d1d = d1 * delta; +; const double d2d = d2 * delta; +; const double d3d = d3 * delta; +; +; for (j = 0; j <= i; j++) +; cells[j] = d1d * cells[j + 1] + d2d * cells[j] + d3d * cells[j + 2]; +; +; ...into this: +; +; int j; +; +; for (j = 0; j <= i; j++) +; cells[j] = (d1 * cells[j + 1] + d2 * cells[j] + d3 * cells[j + 2]) * delta; +; +; We expect the LICM pass to undo this transformation. +; + + +define void @innermost_loop_3d_fast(i32 %i, double %d1, double %d2, double %d3, double %delta, ptr %cells) { +; REASSOCIATE_ONLY-LABEL: define void @innermost_loop_3d_fast +; REASSOCIATE_ONLY-SAME: (i32 [[I:%.*]], double [[D1:%.*]], double [[D2:%.*]], double [[D3:%.*]], double [[DELTA:%.*]], ptr [[CELLS:%.*]]) { +; REASSOCIATE_ONLY-NEXT: entry: +; REASSOCIATE_ONLY-NEXT: br label [[FOR_COND:%.*]] +; REASSOCIATE_ONLY: for.cond: +; REASSOCIATE_ONLY-NEXT: [[J:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[ADD_J_1:%.*]], [[FOR_BODY:%.*]] ] +; REASSOCIATE_ONLY-NEXT: [[CMP_NOT:%.*]] = icmp sgt i32 [[J]], [[I]] +; REASSOCIATE_ONLY-NEXT: br i1 [[CMP_NOT]], label [[FOR_END:%.*]], label [[FOR_BODY]] +; REASSOCIATE_ONLY: for.body: +; REASSOCIATE_ONLY-NEXT: [[ADD_J_1]] = add nuw nsw i32 [[J]], 1 +; REASSOCIATE_ONLY-NEXT: [[IDXPROM_J_1:%.*]] = zext i32 [[ADD_J_1]] to i64 +; REASSOCIATE_ONLY-NEXT: [[ARRAYIDX_J_1:%.*]] = getelementptr inbounds double, ptr [[CELLS]], i64 [[IDXPROM_J_1]] +; REASSOCIATE_ONLY-NEXT: [[CELL_1:%.*]] = load double, ptr [[ARRAYIDX_J_1]], align 8 +; REASSOCIATE_ONLY-NEXT: [[FMUL_1:%.*]] = fmul fast double [[CELL_1]], [[D1]] +; REASSOCIATE_ONLY-NEXT: [[IDXPROM_J:%.*]] = zext i32 [[J]] to i64 +; REASSOCIATE_ONLY-NEXT: [[ARRAYIDX_J:%.*]] = getelementptr inbounds double, ptr [[CELLS]], i64 [[IDXPROM_J]] +; REASSOCIATE_ONLY-NEXT: [[CELL_2:%.*]] = load double, ptr [[ARRAYIDX_J]], align 8 +; REASSOCIATE_ONLY-NEXT: [[FMUL_2:%.*]] = fmul fast double [[CELL_2]], [[D2]] +; REASSOCIATE_ONLY-NEXT: [[ADD_J_2:%.*]] = add nuw nsw i32 [[J]], 2 +; REASSOCIATE_ONLY-NEXT: [[IDXPROM_J_2:%.*]] = zext i32 [[ADD_J_2]] to i64 +; REASSOCIATE_ONLY-NEXT: [[ARRAYIDX_J_2:%.*]] = getelementptr inbounds double, ptr [[CELLS]], i64 [[IDXPROM_J_2]] +; REASSOCIATE_ONLY-NEXT: [[CELL_3:%.*]] = load double, ptr [[ARRAYIDX_J_2]], align 8 +; REASSOCIATE_ONLY-NEXT: [[FMUL_3:%.*]] = fmul fast double [[CELL_3]], [[D3]] +; REASSOCIATE_ONLY-NEXT: [[REASS_ADD:%.*]] = fadd fast double [[FMUL_2]], [[FMUL_1]] +; REASSOCIATE_ONLY-NEXT: [[REASS_ADD1:%.*]] = fadd fast double [[REASS_ADD]], [[FMUL_3]] +; REASSOCIATE_ONLY-NEXT: [[REASS_MUL:%.*]] = fmul fast double [[REASS_ADD1]], [[DELTA]] +; REASSOCIATE_ONLY-NEXT: store double [[REASS_MUL]], ptr [[ARRAYIDX_J_2]], align 8 +; REASSOCIATE_ONLY-NEXT: br label [[FOR_COND]] +; REASSOCIATE_ONLY: for.end: +; REASSOCIATE_ONLY-NEXT: ret void +; +; LICM_ONLY-LABEL: define void @innermost_loop_3d_fast +; LICM_ONLY-SAME: (i32 [[I:%.*]], double [[D1:%.*]], double [[D2:%.*]], double [[D3:%.*]], double [[DELTA:%.*]], ptr [[CELLS:%.*]]) { +; LICM_ONLY-NEXT: entry: +; LICM_ONLY-NEXT: [[FMUL_D1:%.*]] = fmul fast double [[D1]], [[DELTA]] +; LICM_ONLY-NEXT: [[FMUL_D2:%.*]] = fmul fast double [[D2]], [[DELTA]] +; LICM_ONLY-NEXT: [[FMUL_D3:%.*]] = fmul fast double [[D3]], [[DELTA]] +; LICM_ONLY-NEXT: br label [[FOR_COND:%.*]] +; LICM_ONLY: for.cond: +; LICM_ONLY-NEXT: [[J:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[ADD_J_1:%.*]], [[FOR_BODY:%.*]] ] +; LICM_ONLY-NEXT: [[CMP_NOT:%.*]] = icmp sgt i32 [[J]], [[I]] +; LICM_ONLY-NEXT: br i1 [[CMP_NOT]], label [[FOR_END:%.*]], label [[FOR_BODY]] +; LICM_ONLY: for.body: +; LICM_ONLY-NEXT: [[ADD_J_1]] = add nuw nsw i32 [[J]], 1 +; LICM_ONLY-NEXT: [[IDXPROM_J_1:%.*]] = zext i32 [[ADD_J_1]] to i64 +; LICM_ONLY-NEXT: [[ARRAYIDX_J_1:%.*]] = getelementptr inbounds double, ptr [[CELLS]], i64 [[IDXPROM_J_1]] +; LICM_ONLY-NEXT: [[CELL_1:%.*]] = load double, ptr [[ARRAYIDX_J_1]], align 8 +; LICM_ONLY-NEXT: [[FMUL_1:%.*]] = fmul fast double [[FMUL_D1]], [[CELL_1]] +; LICM_ONLY-NEXT: [[IDXPROM_J:%.*]] = zext i32 [[J]] to i64 +; LICM_ONLY-NEXT: [[ARRAYIDX_J:%.*]] = getelementptr inbounds double, ptr [[CELLS]], i64 [[IDXPROM_J]] +; LICM_ONLY-NEXT: [[CELL_2:%.*]] = load double, ptr [[ARRAYIDX_J]], align 8 +; LICM_ONLY-NEXT: [[FMUL_2:%.*]] = fmul fast double [[FMUL_D2]], [[CELL_2]] +; LICM_ONLY-NEXT: [[FADD_1:%.*]] = fadd fast double [[FMUL_1]], [[FMUL_2]] +; LICM_ONLY-NEXT: [[ADD_J_2:%.*]] = add nuw nsw i32 [[J]], 2 +; LICM_ONLY-NEXT: [[IDXPROM_J_2:%.*]] = zext i32 [[ADD_J_2]] to i64 +; LICM_ONLY-NEXT: [[ARRAYIDX_J_2:%.*]] = getelementptr inbounds double, ptr [[CELLS]], i64 [[IDXPROM_J_2]] +; LICM_ONLY-NEXT: [[CELL_3:%.*]] = load double, ptr [[ARRAYIDX_J_2]], align 8 +; LICM_ONLY-NEXT: [[FMUL_3:%.*]] = fmul fast double [[FMUL_D3]], [[CELL_3]] +; LICM_ONLY-NEXT: [[FADD_2:%.*]] = fadd fast double [[FADD_1]], [[FMUL_3]] +; LICM_ONLY-NEXT: store double [[FADD_2]], ptr [[ARRAYIDX_J_2]], align 8 +; LICM_ONLY-NEXT: br label [[FOR_COND]] +; LICM_ONLY: for.end: +; LICM_ONLY-NEXT: ret void +; +; LICM_AFTER_REASSOCIATE-LABEL: define void @innermost_loop_3d_fast +; LICM_AFTER_REASSOCIATE-SAME: (i32 [[I:%.*]], double [[D1:%.*]], double [[D2:%.*]], double [[D3:%.*]], double [[DELTA:%.*]], ptr [[CELLS:%.*]]) { +; LICM_AFTER_REASSOCIATE-NEXT: entry: +; LICM_AFTER_REASSOCIATE-NEXT: br label [[FOR_COND:%.*]] +; LICM_AFTER_REASSOCIATE: for.cond: +; LICM_AFTER_REASSOCIATE-NEXT: [[J:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[ADD_J_1:%.*]], [[FOR_BODY:%.*]] ] +; LICM_AFTER_REASSOCIATE-NEXT: [[CMP_NOT:%.*]] = icmp sgt i32 [[J]], [[I]] +; LICM_AFTER_REASSOCIATE-NEXT: br i1 [[CMP_NOT]], label [[FOR_END:%.*]], label [[FOR_BODY]] +; LICM_AFTER_REASSOCIATE: for.body: +; LICM_AFTER_REASSOCIATE-NEXT: [[ADD_J_1]] = add nuw nsw i32 [[J]], 1 +; LICM_AFTER_REASSOCIATE-NEXT: [[IDXPROM_J_1:%.*]] = zext i32 [[ADD_J_1]] to i64 +; LICM_AFTER_REASSOCIATE-NEXT: [[ARRAYIDX_J_1:%.*]] = getelementptr inbounds double, ptr [[CELLS]], i64 [[IDXPROM_J_1]] +; LICM_AFTER_REASSOCIATE-NEXT: [[CELL_1:%.*]] = load double, ptr [[ARRAYIDX_J_1]], align 8 +; LICM_AFTER_REASSOCIATE-NEXT: [[FMUL_1:%.*]] = fmul fast double [[CELL_1]], [[D1]] +; LICM_AFTER_REASSOCIATE-NEXT: [[IDXPROM_J:%.*]] = zext i32 [[J]] to i64 +; LICM_AFTER_REASSOCIATE-NEXT: [[ARRAYIDX_J:%.*]] = getelementptr inbounds double, ptr [[CELLS]], i64 [[IDXPROM_J]] +; LICM_AFTER_REASSOCIATE-NEXT: [[CELL_2:%.*]] = load double, ptr [[ARRAYIDX_J]], align 8 +; LICM_AFTER_REASSOCIATE-NEXT: [[FMUL_2:%.*]] = fmul fast double [[CELL_2]], [[D2]] +; LICM_AFTER_REASSOCIATE-NEXT: [[ADD_J_2:%.*]] = add nuw nsw i32 [[J]], 2 +; LICM_AFTER_REASSOCIATE-NEXT: [[IDXPROM_J_2:%.*]] = zext i32 [[ADD_J_2]] to i64 +; LICM_AFTER_REASSOCIATE-NEXT: [[ARRAYIDX_J_2:%.*]] = getelementptr inbounds double, ptr [[CELLS]], i64 [[IDXPROM_J_2]] +; LICM_AFTER_REASSOCIATE-NEXT: [[CELL_3:%.*]] = load double, ptr [[ARRAYIDX_J_2]], align 8 +; LICM_AFTER_REASSOCIATE-NEXT: [[FMUL_3:%.*]] = fmul fast double [[CELL_3]], [[D3]] +; LICM_AFTER_REASSOCIATE-NEXT: [[REASS_ADD:%.*]] = fadd fast double [[FMUL_2]], [[FMUL_1]] +; LICM_AFTER_REASSOCIATE-NEXT: [[REASS_ADD1:%.*]] = fadd fast double [[REASS_ADD]], [[FMUL_3]] +; LICM_AFTER_REASSOCIATE-NEXT: [[REASS_MUL:%.*]] = fmul fast double [[REASS_ADD1]], [[DELTA]] +; LICM_AFTER_REASSOCIATE-NEXT: store double [[REASS_MUL]], ptr [[ARRAYIDX_J_2]], align 8 +; LICM_AFTER_REASSOCIATE-NEXT: br label [[FOR_COND]] +; LICM_AFTER_REASSOCIATE: for.end: +; LICM_AFTER_REASSOCIATE-NEXT: ret void +; +entry: + %fmul.d1 = fmul fast double %d1, %delta + %fmul.d2 = fmul fast double %d2, %delta + %fmul.d3 = fmul fast double %d3, %delta + br label %for.cond + +for.cond: + %j = phi i32 [ 0, %entry ], [ %add.j.1, %for.body ] + %cmp.not = icmp sgt i32 %j, %i + br i1 %cmp.not, label %for.end, label %for.body + +for.body: + %add.j.1 = add nuw nsw i32 %j, 1 + %idxprom.j.1 = zext i32 %add.j.1 to i64 + %arrayidx.j.1 = getelementptr inbounds double, ptr %cells, i64 %idxprom.j.1 + %cell.1 = load double, ptr %arrayidx.j.1, align 8 + %fmul.1 = fmul fast double %fmul.d1, %cell.1 + %idxprom.j = zext i32 %j to i64 + %arrayidx.j = getelementptr inbounds double, ptr %cells, i64 %idxprom.j + %cell.2 = load double, ptr %arrayidx.j, align 8 + %fmul.2 = fmul fast double %fmul.d2, %cell.2 + %fadd.1 = fadd fast double %fmul.1, %fmul.2 + %add.j.2 = add nuw nsw i32 %j, 2 + %idxprom.j.2 = zext i32 %add.j.2 to i64 + %arrayidx.j.2 = getelementptr inbounds double, ptr %cells, i64 %idxprom.j.2 + %cell.3 = load double, ptr %arrayidx.j.2, align 8 + %fmul.3 = fmul fast double %fmul.d3, %cell.3 + %fadd.2 = fadd fast double %fadd.1, %fmul.3 + store double %fadd.2, ptr %arrayidx.j.2, align 8 + br label %for.cond + +for.end: + ret void +} + +; +; When there is no 'fast' attribute, the transformation should not happen. +; + +define void @innermost_loop_2d_nofast(i32 %i, double %d1, double %d2, double %delta, ptr %cells) { +; REASSOCIATE_ONLY-LABEL: define void @innermost_loop_2d_nofast +; REASSOCIATE_ONLY-SAME: (i32 [[I:%.*]], double [[D1:%.*]], double [[D2:%.*]], double [[DELTA:%.*]], ptr [[CELLS:%.*]]) { +; REASSOCIATE_ONLY-NEXT: entry: +; REASSOCIATE_ONLY-NEXT: [[FMUL_D1:%.*]] = fmul double [[D1]], [[DELTA]] +; REASSOCIATE_ONLY-NEXT: [[FMUL_D2:%.*]] = fmul double [[D2]], [[DELTA]] +; REASSOCIATE_ONLY-NEXT: br label [[FOR_COND:%.*]] +; REASSOCIATE_ONLY: for.cond: +; REASSOCIATE_ONLY-NEXT: [[J:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[ADD_J_1:%.*]], [[FOR_BODY:%.*]] ] +; REASSOCIATE_ONLY-NEXT: [[CMP_NOT:%.*]] = icmp sgt i32 [[J]], [[I]] +; REASSOCIATE_ONLY-NEXT: br i1 [[CMP_NOT]], label [[FOR_END:%.*]], label [[FOR_BODY]] +; REASSOCIATE_ONLY: for.body: +; REASSOCIATE_ONLY-NEXT: [[ADD_J_1]] = add nuw nsw i32 [[J]], 1 +; REASSOCIATE_ONLY-NEXT: [[IDXPROM_J_1:%.*]] = zext i32 [[ADD_J_1]] to i64 +; REASSOCIATE_ONLY-NEXT: [[ARRAYIDX_J_1:%.*]] = getelementptr inbounds double, ptr [[CELLS]], i64 [[IDXPROM_J_1]] +; REASSOCIATE_ONLY-NEXT: [[CELL_1:%.*]] = load double, ptr [[ARRAYIDX_J_1]], align 8 +; REASSOCIATE_ONLY-NEXT: [[FMUL_1:%.*]] = fmul double [[FMUL_D1]], [[CELL_1]] +; REASSOCIATE_ONLY-NEXT: [[IDXPROM_J:%.*]] = zext i32 [[J]] to i64 +; REASSOCIATE_ONLY-NEXT: [[ARRAYIDX_J:%.*]] = getelementptr inbounds double, ptr [[CELLS]], i64 [[IDXPROM_J]] +; REASSOCIATE_ONLY-NEXT: [[CELL_2:%.*]] = load double, ptr [[ARRAYIDX_J]], align 8 +; REASSOCIATE_ONLY-NEXT: [[FMUL_2:%.*]] = fmul double [[FMUL_D2]], [[CELL_2]] +; REASSOCIATE_ONLY-NEXT: [[FADD_1:%.*]] = fadd double [[FMUL_1]], [[FMUL_2]] +; REASSOCIATE_ONLY-NEXT: store double [[FADD_1]], ptr [[ARRAYIDX_J]], align 8 +; REASSOCIATE_ONLY-NEXT: br label [[FOR_COND]] +; REASSOCIATE_ONLY: for.end: +; REASSOCIATE_ONLY-NEXT: ret void +; +; LICM_ONLY-LABEL: define void @innermost_loop_2d_nofast +; LICM_ONLY-SAME: (i32 [[I:%.*]], double [[D1:%.*]], double [[D2:%.*]], double [[DELTA:%.*]], ptr [[CELLS:%.*]]) { +; LICM_ONLY-NEXT: entry: +; LICM_ONLY-NEXT: [[FMUL_D1:%.*]] = fmul double [[D1]], [[DELTA]] +; LICM_ONLY-NEXT: [[FMUL_D2:%.*]] = fmul double [[D2]], [[DELTA]] +; LICM_ONLY-NEXT: br label [[FOR_COND:%.*]] +; LICM_ONLY: for.cond: +; LICM_ONLY-NEXT: [[J:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[ADD_J_1:%.*]], [[FOR_BODY:%.*]] ] +; LICM_ONLY-NEXT: [[CMP_NOT:%.*]] = icmp sgt i32 [[J]], [[I]] +; LICM_ONLY-NEXT: br i1 [[CMP_NOT]], label [[FOR_END:%.*]], label [[FOR_BODY]] +; LICM_ONLY: for.body: +; LICM_ONLY-NEXT: [[ADD_J_1]] = add nuw nsw i32 [[J]], 1 +; LICM_ONLY-NEXT: [[IDXPROM_J_1:%.*]] = zext i32 [[ADD_J_1]] to i64 +; LICM_ONLY-NEXT: [[ARRAYIDX_J_1:%.*]] = getelementptr inbounds double, ptr [[CELLS]], i64 [[IDXPROM_J_1]] +; LICM_ONLY-NEXT: [[CELL_1:%.*]] = load double, ptr [[ARRAYIDX_J_1]], align 8 +; LICM_ONLY-NEXT: [[FMUL_1:%.*]] = fmul double [[FMUL_D1]], [[CELL_1]] +; LICM_ONLY-NEXT: [[IDXPROM_J:%.*]] = zext i32 [[J]] to i64 +; LICM_ONLY-NEXT: [[ARRAYIDX_J:%.*]] = getelementptr inbounds double, ptr [[CELLS]], i64 [[IDXPROM_J]] +; LICM_ONLY-NEXT: [[CELL_2:%.*]] = load double, ptr [[ARRAYIDX_J]], align 8 +; LICM_ONLY-NEXT: [[FMUL_2:%.*]] = fmul double [[FMUL_D2]], [[CELL_2]] +; LICM_ONLY-NEXT: [[FADD_1:%.*]] = fadd double [[FMUL_1]], [[FMUL_2]] +; LICM_ONLY-NEXT: store double [[FADD_1]], ptr [[ARRAYIDX_J]], align 8 +; LICM_ONLY-NEXT: br label [[FOR_COND]] +; LICM_ONLY: for.end: +; LICM_ONLY-NEXT: ret void +; +; LICM_AFTER_REASSOCIATE-LABEL: define void @innermost_loop_2d_nofast +; LICM_AFTER_REASSOCIATE-SAME: (i32 [[I:%.*]], double [[D1:%.*]], double [[D2:%.*]], double [[DELTA:%.*]], ptr [[CELLS:%.*]]) { +; LICM_AFTER_REASSOCIATE-NEXT: entry: +; LICM_AFTER_REASSOCIATE-NEXT: [[FMUL_D1:%.*]] = fmul double [[D1]], [[DELTA]] +; LICM_AFTER_REASSOCIATE-NEXT: [[FMUL_D2:%.*]] = fmul double [[D2]], [[DELTA]] +; LICM_AFTER_REASSOCIATE-NEXT: br label [[FOR_COND:%.*]] +; LICM_AFTER_REASSOCIATE: for.cond: +; LICM_AFTER_REASSOCIATE-NEXT: [[J:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[ADD_J_1:%.*]], [[FOR_BODY:%.*]] ] +; LICM_AFTER_REASSOCIATE-NEXT: [[CMP_NOT:%.*]] = icmp sgt i32 [[J]], [[I]] +; LICM_AFTER_REASSOCIATE-NEXT: br i1 [[CMP_NOT]], label [[FOR_END:%.*]], label [[FOR_BODY]] +; LICM_AFTER_REASSOCIATE: for.body: +; LICM_AFTER_REASSOCIATE-NEXT: [[ADD_J_1]] = add nuw nsw i32 [[J]], 1 +; LICM_AFTER_REASSOCIATE-NEXT: [[IDXPROM_J_1:%.*]] = zext i32 [[ADD_J_1]] to i64 +; LICM_AFTER_REASSOCIATE-NEXT: [[ARRAYIDX_J_1:%.*]] = getelementptr inbounds double, ptr [[CELLS]], i64 [[IDXPROM_J_1]] +; LICM_AFTER_REASSOCIATE-NEXT: [[CELL_1:%.*]] = load double, ptr [[ARRAYIDX_J_1]], align 8 +; LICM_AFTER_REASSOCIATE-NEXT: [[FMUL_1:%.*]] = fmul double [[FMUL_D1]], [[CELL_1]] +; LICM_AFTER_REASSOCIATE-NEXT: [[IDXPROM_J:%.*]] = zext i32 [[J]] to i64 +; LICM_AFTER_REASSOCIATE-NEXT: [[ARRAYIDX_J:%.*]] = getelementptr inbounds double, ptr [[CELLS]], i64 [[IDXPROM_J]] +; LICM_AFTER_REASSOCIATE-NEXT: [[CELL_2:%.*]] = load double, ptr [[ARRAYIDX_J]], align 8 +; LICM_AFTER_REASSOCIATE-NEXT: [[FMUL_2:%.*]] = fmul double [[FMUL_D2]], [[CELL_2]] +; LICM_AFTER_REASSOCIATE-NEXT: [[FADD_1:%.*]] = fadd double [[FMUL_1]], [[FMUL_2]] +; LICM_AFTER_REASSOCIATE-NEXT: store double [[FADD_1]], ptr [[ARRAYIDX_J]], align 8 +; LICM_AFTER_REASSOCIATE-NEXT: br label [[FOR_COND]] +; LICM_AFTER_REASSOCIATE: for.end: +; LICM_AFTER_REASSOCIATE-NEXT: ret void +; +entry: + %fmul.d1 = fmul double %d1, %delta + %fmul.d2 = fmul double %d2, %delta + br label %for.cond + +for.cond: + %j = phi i32 [ 0, %entry ], [ %add.j.1, %for.body ] + %cmp.not = icmp sgt i32 %j, %i + br i1 %cmp.not, label %for.end, label %for.body + +for.body: + %add.j.1 = add nuw nsw i32 %j, 1 + %idxprom.j.1 = zext i32 %add.j.1 to i64 + %arrayidx.j.1 = getelementptr inbounds double, ptr %cells, i64 %idxprom.j.1 + %cell.1 = load double, ptr %arrayidx.j.1, align 8 + %fmul.1 = fmul double %fmul.d1, %cell.1 + %idxprom.j = zext i32 %j to i64 + %arrayidx.j = getelementptr inbounds double, ptr %cells, i64 %idxprom.j + %cell.2 = load double, ptr %arrayidx.j, align 8 + %fmul.2 = fmul double %fmul.d2, %cell.2 + %fadd.1 = fadd double %fmul.1, %fmul.2 + store double %fadd.1, ptr %arrayidx.j, align 8 + br label %for.cond + +for.end: + ret void +} + +; +; The following loop should be modified by the LICM pass, +; +; int j; +; +; for (j = 0; j <= i; j++) +; cells[j] = (d1 * cells[j + 1] + d2 * cells[j]) * delta; +; +; ...into this: +; +; int j; +; const double d1d = d1 * delta; +; const double d2d = d2 * delta; +; +; for (j = 0; j <= i; j++) +; cells[j] = d1d * cells[j + 1] + d2d * cells[j]; +; + +define void @innermost_loop_2d_fast_reassociated(i32 %i, double %d1, double %d2, double %delta, ptr %cells) { +; REASSOCIATE_ONLY-LABEL: define void @innermost_loop_2d_fast_reassociated +; REASSOCIATE_ONLY-SAME: (i32 [[I:%.*]], double [[D1:%.*]], double [[D2:%.*]], double [[DELTA:%.*]], ptr [[CELLS:%.*]]) { +; REASSOCIATE_ONLY-NEXT: entry: +; REASSOCIATE_ONLY-NEXT: br label [[FOR_COND:%.*]] +; REASSOCIATE_ONLY: for.cond: +; REASSOCIATE_ONLY-NEXT: [[J:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[ADD_J_1:%.*]], [[FOR_BODY:%.*]] ] +; REASSOCIATE_ONLY-NEXT: [[CMP_NOT:%.*]] = icmp sgt i32 [[J]], [[I]] +; REASSOCIATE_ONLY-NEXT: br i1 [[CMP_NOT]], label [[FOR_END:%.*]], label [[FOR_BODY]] +; REASSOCIATE_ONLY: for.body: +; REASSOCIATE_ONLY-NEXT: [[ADD_J_1]] = add nuw nsw i32 [[J]], 1 +; REASSOCIATE_ONLY-NEXT: [[IDXPROM_J_1:%.*]] = zext i32 [[ADD_J_1]] to i64 +; REASSOCIATE_ONLY-NEXT: [[ARRAYIDX_J_1:%.*]] = getelementptr inbounds double, ptr [[CELLS]], i64 [[IDXPROM_J_1]] +; REASSOCIATE_ONLY-NEXT: [[CELL_1:%.*]] = load double, ptr [[ARRAYIDX_J_1]], align 8 +; REASSOCIATE_ONLY-NEXT: [[FMUL_1:%.*]] = fmul fast double [[CELL_1]], [[D1]] +; REASSOCIATE_ONLY-NEXT: [[IDXPROM_J:%.*]] = zext i32 [[J]] to i64 +; REASSOCIATE_ONLY-NEXT: [[ARRAYIDX_J:%.*]] = getelementptr inbounds double, ptr [[CELLS]], i64 [[IDXPROM_J]] +; REASSOCIATE_ONLY-NEXT: [[CELL_2:%.*]] = load double, ptr [[ARRAYIDX_J]], align 8 +; REASSOCIATE_ONLY-NEXT: [[FMUL_2:%.*]] = fmul fast double [[CELL_2]], [[D2]] +; REASSOCIATE_ONLY-NEXT: [[REASS_ADD:%.*]] = fadd fast double [[FMUL_2]], [[FMUL_1]] +; REASSOCIATE_ONLY-NEXT: [[REASS_MUL:%.*]] = fmul fast double [[REASS_ADD]], [[DELTA]] +; REASSOCIATE_ONLY-NEXT: store double [[REASS_MUL]], ptr [[ARRAYIDX_J]], align 8 +; REASSOCIATE_ONLY-NEXT: br label [[FOR_COND]] +; REASSOCIATE_ONLY: for.end: +; REASSOCIATE_ONLY-NEXT: ret void +; +; LICM_ONLY-LABEL: define void @innermost_loop_2d_fast_reassociated +; LICM_ONLY-SAME: (i32 [[I:%.*]], double [[D1:%.*]], double [[D2:%.*]], double [[DELTA:%.*]], ptr [[CELLS:%.*]]) { +; LICM_ONLY-NEXT: entry: +; LICM_ONLY-NEXT: br label [[FOR_COND:%.*]] +; LICM_ONLY: for.cond: +; LICM_ONLY-NEXT: [[J:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[ADD_J_1:%.*]], [[FOR_BODY:%.*]] ] +; LICM_ONLY-NEXT: [[CMP_NOT:%.*]] = icmp sgt i32 [[J]], [[I]] +; LICM_ONLY-NEXT: br i1 [[CMP_NOT]], label [[FOR_END:%.*]], label [[FOR_BODY]] +; LICM_ONLY: for.body: +; LICM_ONLY-NEXT: [[ADD_J_1]] = add nuw nsw i32 [[J]], 1 +; LICM_ONLY-NEXT: [[IDXPROM_J_1:%.*]] = zext i32 [[ADD_J_1]] to i64 +; LICM_ONLY-NEXT: [[ARRAYIDX_J_1:%.*]] = getelementptr inbounds double, ptr [[CELLS]], i64 [[IDXPROM_J_1]] +; LICM_ONLY-NEXT: [[CELL_1:%.*]] = load double, ptr [[ARRAYIDX_J_1]], align 8 +; LICM_ONLY-NEXT: [[FMUL_1:%.*]] = fmul fast double [[CELL_1]], [[D1]] +; LICM_ONLY-NEXT: [[IDXPROM_J:%.*]] = zext i32 [[J]] to i64 +; LICM_ONLY-NEXT: [[ARRAYIDX_J:%.*]] = getelementptr inbounds double, ptr [[CELLS]], i64 [[IDXPROM_J]] +; LICM_ONLY-NEXT: [[CELL_2:%.*]] = load double, ptr [[ARRAYIDX_J]], align 8 +; LICM_ONLY-NEXT: [[FMUL_2:%.*]] = fmul fast double [[CELL_2]], [[D2]] +; LICM_ONLY-NEXT: [[REASS_ADD:%.*]] = fadd fast double [[FMUL_2]], [[FMUL_1]] +; LICM_ONLY-NEXT: [[REASS_MUL:%.*]] = fmul fast double [[REASS_ADD]], [[DELTA]] +; LICM_ONLY-NEXT: store double [[REASS_MUL]], ptr [[ARRAYIDX_J]], align 8 +; LICM_ONLY-NEXT: br label [[FOR_COND]] +; LICM_ONLY: for.end: +; LICM_ONLY-NEXT: ret void +; +; LICM_AFTER_REASSOCIATE-LABEL: define void @innermost_loop_2d_fast_reassociated +; LICM_AFTER_REASSOCIATE-SAME: (i32 [[I:%.*]], double [[D1:%.*]], double [[D2:%.*]], double [[DELTA:%.*]], ptr [[CELLS:%.*]]) { +; LICM_AFTER_REASSOCIATE-NEXT: entry: +; LICM_AFTER_REASSOCIATE-NEXT: br label [[FOR_COND:%.*]] +; LICM_AFTER_REASSOCIATE: for.cond: +; LICM_AFTER_REASSOCIATE-NEXT: [[J:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[ADD_J_1:%.*]], [[FOR_BODY:%.*]] ] +; LICM_AFTER_REASSOCIATE-NEXT: [[CMP_NOT:%.*]] = icmp sgt i32 [[J]], [[I]] +; LICM_AFTER_REASSOCIATE-NEXT: br i1 [[CMP_NOT]], label [[FOR_END:%.*]], label [[FOR_BODY]] +; LICM_AFTER_REASSOCIATE: for.body: +; LICM_AFTER_REASSOCIATE-NEXT: [[ADD_J_1]] = add nuw nsw i32 [[J]], 1 +; LICM_AFTER_REASSOCIATE-NEXT: [[IDXPROM_J_1:%.*]] = zext i32 [[ADD_J_1]] to i64 +; LICM_AFTER_REASSOCIATE-NEXT: [[ARRAYIDX_J_1:%.*]] = getelementptr inbounds double, ptr [[CELLS]], i64 [[IDXPROM_J_1]] +; LICM_AFTER_REASSOCIATE-NEXT: [[CELL_1:%.*]] = load double, ptr [[ARRAYIDX_J_1]], align 8 +; LICM_AFTER_REASSOCIATE-NEXT: [[FMUL_1:%.*]] = fmul fast double [[CELL_1]], [[D1]] +; LICM_AFTER_REASSOCIATE-NEXT: [[IDXPROM_J:%.*]] = zext i32 [[J]] to i64 +; LICM_AFTER_REASSOCIATE-NEXT: [[ARRAYIDX_J:%.*]] = getelementptr inbounds double, ptr [[CELLS]], i64 [[IDXPROM_J]] +; LICM_AFTER_REASSOCIATE-NEXT: [[CELL_2:%.*]] = load double, ptr [[ARRAYIDX_J]], align 8 +; LICM_AFTER_REASSOCIATE-NEXT: [[FMUL_2:%.*]] = fmul fast double [[CELL_2]], [[D2]] +; LICM_AFTER_REASSOCIATE-NEXT: [[REASS_ADD:%.*]] = fadd fast double [[FMUL_2]], [[FMUL_1]] +; LICM_AFTER_REASSOCIATE-NEXT: [[REASS_MUL:%.*]] = fmul fast double [[REASS_ADD]], [[DELTA]] +; LICM_AFTER_REASSOCIATE-NEXT: store double [[REASS_MUL]], ptr [[ARRAYIDX_J]], align 8 +; LICM_AFTER_REASSOCIATE-NEXT: br label [[FOR_COND]] +; LICM_AFTER_REASSOCIATE: for.end: +; LICM_AFTER_REASSOCIATE-NEXT: ret void +; +entry: + br label %for.cond + +for.cond: + %j = phi i32 [ 0, %entry ], [ %add.j.1, %for.body ] + %cmp.not = icmp sgt i32 %j, %i + br i1 %cmp.not, label %for.end, label %for.body + +for.body: + %add.j.1 = add nuw nsw i32 %j, 1 + %idxprom.j.1 = zext i32 %add.j.1 to i64 + %arrayidx.j.1 = getelementptr inbounds double, ptr %cells, i64 %idxprom.j.1 + %cell.1 = load double, ptr %arrayidx.j.1, align 8 + %fmul.1 = fmul fast double %cell.1, %d1 + %idxprom.j = zext i32 %j to i64 + %arrayidx.j = getelementptr inbounds double, ptr %cells, i64 %idxprom.j + %cell.2 = load double, ptr %arrayidx.j, align 8 + %fmul.2 = fmul fast double %cell.2, %d2 + %reass.add = fadd fast double %fmul.2, %fmul.1 + %reass.mul = fmul fast double %reass.add, %delta + store double %reass.mul, ptr %arrayidx.j, align 8 + br label %for.cond + +for.end: + ret void +} + +; +; When there is no 'fast' attribute, the transformation should not happen. +; + +define void @innermost_loop_2d_nofast_reassociated(i32 %i, double %d1, double %d2, double %delta, ptr %cells) { +; REASSOCIATE_ONLY-LABEL: define void @innermost_loop_2d_nofast_reassociated +; REASSOCIATE_ONLY-SAME: (i32 [[I:%.*]], double [[D1:%.*]], double [[D2:%.*]], double [[DELTA:%.*]], ptr [[CELLS:%.*]]) { +; REASSOCIATE_ONLY-NEXT: entry: +; REASSOCIATE_ONLY-NEXT: br label [[FOR_COND:%.*]] +; REASSOCIATE_ONLY: for.cond: +; REASSOCIATE_ONLY-NEXT: [[J:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[ADD_J_1:%.*]], [[FOR_BODY:%.*]] ] +; REASSOCIATE_ONLY-NEXT: [[CMP_NOT:%.*]] = icmp sgt i32 [[J]], [[I]] +; REASSOCIATE_ONLY-NEXT: br i1 [[CMP_NOT]], label [[FOR_END:%.*]], label [[FOR_BODY]] +; REASSOCIATE_ONLY: for.body: +; REASSOCIATE_ONLY-NEXT: [[ADD_J_1]] = add nuw nsw i32 [[J]], 1 +; REASSOCIATE_ONLY-NEXT: [[IDXPROM_J_1:%.*]] = zext i32 [[ADD_J_1]] to i64 +; REASSOCIATE_ONLY-NEXT: [[ARRAYIDX_J_1:%.*]] = getelementptr inbounds double, ptr [[CELLS]], i64 [[IDXPROM_J_1]] +; REASSOCIATE_ONLY-NEXT: [[CELL_1:%.*]] = load double, ptr [[ARRAYIDX_J_1]], align 8 +; REASSOCIATE_ONLY-NEXT: [[FMUL_1:%.*]] = fmul double [[D1]], [[CELL_1]] +; REASSOCIATE_ONLY-NEXT: [[IDXPROM_J:%.*]] = zext i32 [[J]] to i64 +; REASSOCIATE_ONLY-NEXT: [[ARRAYIDX_J:%.*]] = getelementptr inbounds double, ptr [[CELLS]], i64 [[IDXPROM_J]] +; REASSOCIATE_ONLY-NEXT: [[CELL_2:%.*]] = load double, ptr [[ARRAYIDX_J]], align 8 +; REASSOCIATE_ONLY-NEXT: [[FMUL_2:%.*]] = fmul double [[D2]], [[CELL_2]] +; REASSOCIATE_ONLY-NEXT: [[REASS_ADD:%.*]] = fadd double [[FMUL_1]], [[FMUL_2]] +; REASSOCIATE_ONLY-NEXT: [[REASS_MUL:%.*]] = fmul double [[DELTA]], [[REASS_ADD]] +; REASSOCIATE_ONLY-NEXT: store double [[REASS_MUL]], ptr [[ARRAYIDX_J]], align 8 +; REASSOCIATE_ONLY-NEXT: br label [[FOR_COND]] +; REASSOCIATE_ONLY: for.end: +; REASSOCIATE_ONLY-NEXT: ret void +; +; LICM_ONLY-LABEL: define void @innermost_loop_2d_nofast_reassociated +; LICM_ONLY-SAME: (i32 [[I:%.*]], double [[D1:%.*]], double [[D2:%.*]], double [[DELTA:%.*]], ptr [[CELLS:%.*]]) { +; LICM_ONLY-NEXT: entry: +; LICM_ONLY-NEXT: br label [[FOR_COND:%.*]] +; LICM_ONLY: for.cond: +; LICM_ONLY-NEXT: [[J:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[ADD_J_1:%.*]], [[FOR_BODY:%.*]] ] +; LICM_ONLY-NEXT: [[CMP_NOT:%.*]] = icmp sgt i32 [[J]], [[I]] +; LICM_ONLY-NEXT: br i1 [[CMP_NOT]], label [[FOR_END:%.*]], label [[FOR_BODY]] +; LICM_ONLY: for.body: +; LICM_ONLY-NEXT: [[ADD_J_1]] = add nuw nsw i32 [[J]], 1 +; LICM_ONLY-NEXT: [[IDXPROM_J_1:%.*]] = zext i32 [[ADD_J_1]] to i64 +; LICM_ONLY-NEXT: [[ARRAYIDX_J_1:%.*]] = getelementptr inbounds double, ptr [[CELLS]], i64 [[IDXPROM_J_1]] +; LICM_ONLY-NEXT: [[CELL_1:%.*]] = load double, ptr [[ARRAYIDX_J_1]], align 8 +; LICM_ONLY-NEXT: [[FMUL_1:%.*]] = fmul double [[CELL_1]], [[D1]] +; LICM_ONLY-NEXT: [[IDXPROM_J:%.*]] = zext i32 [[J]] to i64 +; LICM_ONLY-NEXT: [[ARRAYIDX_J:%.*]] = getelementptr inbounds double, ptr [[CELLS]], i64 [[IDXPROM_J]] +; LICM_ONLY-NEXT: [[CELL_2:%.*]] = load double, ptr [[ARRAYIDX_J]], align 8 +; LICM_ONLY-NEXT: [[FMUL_2:%.*]] = fmul double [[CELL_2]], [[D2]] +; LICM_ONLY-NEXT: [[REASS_ADD:%.*]] = fadd double [[FMUL_2]], [[FMUL_1]] +; LICM_ONLY-NEXT: [[REASS_MUL:%.*]] = fmul double [[REASS_ADD]], [[DELTA]] +; LICM_ONLY-NEXT: store double [[REASS_MUL]], ptr [[ARRAYIDX_J]], align 8 +; LICM_ONLY-NEXT: br label [[FOR_COND]] +; LICM_ONLY: for.end: +; LICM_ONLY-NEXT: ret void +; +; LICM_AFTER_REASSOCIATE-LABEL: define void @innermost_loop_2d_nofast_reassociated +; LICM_AFTER_REASSOCIATE-SAME: (i32 [[I:%.*]], double [[D1:%.*]], double [[D2:%.*]], double [[DELTA:%.*]], ptr [[CELLS:%.*]]) { +; LICM_AFTER_REASSOCIATE-NEXT: entry: +; LICM_AFTER_REASSOCIATE-NEXT: br label [[FOR_COND:%.*]] +; LICM_AFTER_REASSOCIATE: for.cond: +; LICM_AFTER_REASSOCIATE-NEXT: [[J:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[ADD_J_1:%.*]], [[FOR_BODY:%.*]] ] +; LICM_AFTER_REASSOCIATE-NEXT: [[CMP_NOT:%.*]] = icmp sgt i32 [[J]], [[I]] +; LICM_AFTER_REASSOCIATE-NEXT: br i1 [[CMP_NOT]], label [[FOR_END:%.*]], label [[FOR_BODY]] +; LICM_AFTER_REASSOCIATE: for.body: +; LICM_AFTER_REASSOCIATE-NEXT: [[ADD_J_1]] = add nuw nsw i32 [[J]], 1 +; LICM_AFTER_REASSOCIATE-NEXT: [[IDXPROM_J_1:%.*]] = zext i32 [[ADD_J_1]] to i64 +; LICM_AFTER_REASSOCIATE-NEXT: [[ARRAYIDX_J_1:%.*]] = getelementptr inbounds double, ptr [[CELLS]], i64 [[IDXPROM_J_1]] +; LICM_AFTER_REASSOCIATE-NEXT: [[CELL_1:%.*]] = load double, ptr [[ARRAYIDX_J_1]], align 8 +; LICM_AFTER_REASSOCIATE-NEXT: [[FMUL_1:%.*]] = fmul double [[D1]], [[CELL_1]] +; LICM_AFTER_REASSOCIATE-NEXT: [[IDXPROM_J:%.*]] = zext i32 [[J]] to i64 +; LICM_AFTER_REASSOCIATE-NEXT: [[ARRAYIDX_J:%.*]] = getelementptr inbounds double, ptr [[CELLS]], i64 [[IDXPROM_J]] +; LICM_AFTER_REASSOCIATE-NEXT: [[CELL_2:%.*]] = load double, ptr [[ARRAYIDX_J]], align 8 +; LICM_AFTER_REASSOCIATE-NEXT: [[FMUL_2:%.*]] = fmul double [[D2]], [[CELL_2]] +; LICM_AFTER_REASSOCIATE-NEXT: [[REASS_ADD:%.*]] = fadd double [[FMUL_1]], [[FMUL_2]] +; LICM_AFTER_REASSOCIATE-NEXT: [[REASS_MUL:%.*]] = fmul double [[DELTA]], [[REASS_ADD]] +; LICM_AFTER_REASSOCIATE-NEXT: store double [[REASS_MUL]], ptr [[ARRAYIDX_J]], align 8 +; LICM_AFTER_REASSOCIATE-NEXT: br label [[FOR_COND]] +; LICM_AFTER_REASSOCIATE: for.end: +; LICM_AFTER_REASSOCIATE-NEXT: ret void +; +entry: + br label %for.cond + +for.cond: + %j = phi i32 [ 0, %entry ], [ %add.j.1, %for.body ] + %cmp.not = icmp sgt i32 %j, %i + br i1 %cmp.not, label %for.end, label %for.body + +for.body: + %add.j.1 = add nuw nsw i32 %j, 1 + %idxprom.j.1 = zext i32 %add.j.1 to i64 + %arrayidx.j.1 = getelementptr inbounds double, ptr %cells, i64 %idxprom.j.1 + %cell.1 = load double, ptr %arrayidx.j.1, align 8 + %fmul.1 = fmul double %cell.1, %d1 + %idxprom.j = zext i32 %j to i64 + %arrayidx.j = getelementptr inbounds double, ptr %cells, i64 %idxprom.j + %cell.2 = load double, ptr %arrayidx.j, align 8 + %fmul.2 = fmul double %cell.2, %d2 + %reass.add = fadd double %fmul.2, %fmul.1 + %reass.mul = fmul double %reass.add, %delta + store double %reass.mul, ptr %arrayidx.j, align 8 + br label %for.cond + +for.end: + ret void +} + +; +; The following loop will not be modified by the LICM pass: +; +; int j; +; +; for (j = 0; j <= i; j++) +; cells[j] = (d1 * cells[j + 1] + d2 * cells[j] + +; cells[j] * cells[j + 1]) * delta; +; +; This case differs as one of the multiplications involves no invariants. +; + +define void @innermost_loop_3d_fast_reassociated_different(i32 %i, double %d1, double %d2, double %delta, ptr %cells) { +; REASSOCIATE_ONLY-LABEL: define void @innermost_loop_3d_fast_reassociated_different +; REASSOCIATE_ONLY-SAME: (i32 [[I:%.*]], double [[D1:%.*]], double [[D2:%.*]], double [[DELTA:%.*]], ptr [[CELLS:%.*]]) { +; REASSOCIATE_ONLY-NEXT: entry: +; REASSOCIATE_ONLY-NEXT: br label [[FOR_COND:%.*]] +; REASSOCIATE_ONLY: for.cond: +; REASSOCIATE_ONLY-NEXT: [[J:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[ADD_J_1:%.*]], [[FOR_BODY:%.*]] ] +; REASSOCIATE_ONLY-NEXT: [[CMP_NOT:%.*]] = icmp sgt i32 [[J]], [[I]] +; REASSOCIATE_ONLY-NEXT: br i1 [[CMP_NOT]], label [[FOR_END:%.*]], label [[FOR_BODY]] +; REASSOCIATE_ONLY: for.body: +; REASSOCIATE_ONLY-NEXT: [[ADD_J_1]] = add nuw nsw i32 [[J]], 1 +; REASSOCIATE_ONLY-NEXT: [[IDXPROM_J_1:%.*]] = zext i32 [[ADD_J_1]] to i64 +; REASSOCIATE_ONLY-NEXT: [[ARRAYIDX_J_1:%.*]] = getelementptr inbounds double, ptr [[CELLS]], i64 [[IDXPROM_J_1]] +; REASSOCIATE_ONLY-NEXT: [[CELL_1:%.*]] = load double, ptr [[ARRAYIDX_J_1]], align 8 +; REASSOCIATE_ONLY-NEXT: [[IDXPROM_J_2:%.*]] = zext i32 [[ADD_J_1]] to i64 +; REASSOCIATE_ONLY-NEXT: [[ARRAYIDX_J_2:%.*]] = getelementptr inbounds double, ptr [[CELLS]], i64 [[IDXPROM_J_2]] +; REASSOCIATE_ONLY-NEXT: [[CELL_2:%.*]] = load double, ptr [[ARRAYIDX_J_2]], align 8 +; REASSOCIATE_ONLY-NEXT: [[IDXPROM_J_3:%.*]] = zext i32 [[ADD_J_1]] to i64 +; REASSOCIATE_ONLY-NEXT: [[CELL_3:%.*]] = load double, ptr [[ARRAYIDX_J_2]], align 8 +; REASSOCIATE_ONLY-NEXT: [[IDXPROM_J:%.*]] = zext i32 [[J]] to i64 +; REASSOCIATE_ONLY-NEXT: [[ARRAYIDX_J:%.*]] = getelementptr inbounds double, ptr [[CELLS]], i64 [[IDXPROM_J]] +; REASSOCIATE_ONLY-NEXT: [[CELL_4:%.*]] = load double, ptr [[ARRAYIDX_J]], align 8 +; REASSOCIATE_ONLY-NEXT: [[FMUL_1:%.*]] = fmul fast double [[CELL_1]], [[D1]] +; REASSOCIATE_ONLY-NEXT: [[FMUL_2:%.*]] = fmul fast double [[CELL_4]], [[D2]] +; REASSOCIATE_ONLY-NEXT: [[EXTRA_MUL:%.*]] = fmul fast double [[CELL_3]], [[CELL_2]] +; REASSOCIATE_ONLY-NEXT: [[REASS_ADD:%.*]] = fadd fast double [[EXTRA_MUL]], [[FMUL_1]] +; REASSOCIATE_ONLY-NEXT: [[EXTRA_ADD:%.*]] = fadd fast double [[REASS_ADD]], [[FMUL_2]] +; REASSOCIATE_ONLY-NEXT: [[REASS_MUL:%.*]] = fmul fast double [[EXTRA_ADD]], [[DELTA]] +; REASSOCIATE_ONLY-NEXT: store double [[REASS_MUL]], ptr [[ARRAYIDX_J]], align 8 +; REASSOCIATE_ONLY-NEXT: br label [[FOR_COND]] +; REASSOCIATE_ONLY: for.end: +; REASSOCIATE_ONLY-NEXT: ret void +; +; LICM_ONLY-LABEL: define void @innermost_loop_3d_fast_reassociated_different +; LICM_ONLY-SAME: (i32 [[I:%.*]], double [[D1:%.*]], double [[D2:%.*]], double [[DELTA:%.*]], ptr [[CELLS:%.*]]) { +; LICM_ONLY-NEXT: entry: +; LICM_ONLY-NEXT: br label [[FOR_COND:%.*]] +; LICM_ONLY: for.cond: +; LICM_ONLY-NEXT: [[J:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[ADD_J_1:%.*]], [[FOR_BODY:%.*]] ] +; LICM_ONLY-NEXT: [[CMP_NOT:%.*]] = icmp sgt i32 [[J]], [[I]] +; LICM_ONLY-NEXT: br i1 [[CMP_NOT]], label [[FOR_END:%.*]], label [[FOR_BODY]] +; LICM_ONLY: for.body: +; LICM_ONLY-NEXT: [[ADD_J_1]] = add nuw nsw i32 [[J]], 1 +; LICM_ONLY-NEXT: [[IDXPROM_J_1:%.*]] = zext i32 [[ADD_J_1]] to i64 +; LICM_ONLY-NEXT: [[ARRAYIDX_J_1:%.*]] = getelementptr inbounds double, ptr [[CELLS]], i64 [[IDXPROM_J_1]] +; LICM_ONLY-NEXT: [[CELL_1:%.*]] = load double, ptr [[ARRAYIDX_J_1]], align 8 +; LICM_ONLY-NEXT: [[IDXPROM_J_2:%.*]] = zext i32 [[ADD_J_1]] to i64 +; LICM_ONLY-NEXT: [[ARRAYIDX_J_2:%.*]] = getelementptr inbounds double, ptr [[CELLS]], i64 [[IDXPROM_J_2]] +; LICM_ONLY-NEXT: [[CELL_2:%.*]] = load double, ptr [[ARRAYIDX_J_2]], align 8 +; LICM_ONLY-NEXT: [[CELL_3:%.*]] = load double, ptr [[ARRAYIDX_J_2]], align 8 +; LICM_ONLY-NEXT: [[IDXPROM_J:%.*]] = zext i32 [[J]] to i64 +; LICM_ONLY-NEXT: [[ARRAYIDX_J:%.*]] = getelementptr inbounds double, ptr [[CELLS]], i64 [[IDXPROM_J]] +; LICM_ONLY-NEXT: [[CELL_4:%.*]] = load double, ptr [[ARRAYIDX_J]], align 8 +; LICM_ONLY-NEXT: [[FMUL_1:%.*]] = fmul fast double [[CELL_1]], [[D1]] +; LICM_ONLY-NEXT: [[FMUL_2:%.*]] = fmul fast double [[CELL_4]], [[D2]] +; LICM_ONLY-NEXT: [[REASS_ADD:%.*]] = fadd fast double [[FMUL_2]], [[FMUL_1]] +; LICM_ONLY-NEXT: [[EXTRA_MUL:%.*]] = fmul fast double [[CELL_3]], [[CELL_2]] +; LICM_ONLY-NEXT: [[EXTRA_ADD:%.*]] = fadd fast double [[EXTRA_MUL]], [[REASS_ADD]] +; LICM_ONLY-NEXT: [[REASS_MUL:%.*]] = fmul fast double [[EXTRA_ADD]], [[DELTA]] +; LICM_ONLY-NEXT: store double [[REASS_MUL]], ptr [[ARRAYIDX_J]], align 8 +; LICM_ONLY-NEXT: br label [[FOR_COND]] +; LICM_ONLY: for.end: +; LICM_ONLY-NEXT: ret void +; +; LICM_AFTER_REASSOCIATE-LABEL: define void @innermost_loop_3d_fast_reassociated_different +; LICM_AFTER_REASSOCIATE-SAME: (i32 [[I:%.*]], double [[D1:%.*]], double [[D2:%.*]], double [[DELTA:%.*]], ptr [[CELLS:%.*]]) { +; LICM_AFTER_REASSOCIATE-NEXT: entry: +; LICM_AFTER_REASSOCIATE-NEXT: br label [[FOR_COND:%.*]] +; LICM_AFTER_REASSOCIATE: for.cond: +; LICM_AFTER_REASSOCIATE-NEXT: [[J:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[ADD_J_1:%.*]], [[FOR_BODY:%.*]] ] +; LICM_AFTER_REASSOCIATE-NEXT: [[CMP_NOT:%.*]] = icmp sgt i32 [[J]], [[I]] +; LICM_AFTER_REASSOCIATE-NEXT: br i1 [[CMP_NOT]], label [[FOR_END:%.*]], label [[FOR_BODY]] +; LICM_AFTER_REASSOCIATE: for.body: +; LICM_AFTER_REASSOCIATE-NEXT: [[ADD_J_1]] = add nuw nsw i32 [[J]], 1 +; LICM_AFTER_REASSOCIATE-NEXT: [[IDXPROM_J_1:%.*]] = zext i32 [[ADD_J_1]] to i64 +; LICM_AFTER_REASSOCIATE-NEXT: [[ARRAYIDX_J_1:%.*]] = getelementptr inbounds double, ptr [[CELLS]], i64 [[IDXPROM_J_1]] +; LICM_AFTER_REASSOCIATE-NEXT: [[CELL_1:%.*]] = load double, ptr [[ARRAYIDX_J_1]], align 8 +; LICM_AFTER_REASSOCIATE-NEXT: [[IDXPROM_J_2:%.*]] = zext i32 [[ADD_J_1]] to i64 +; LICM_AFTER_REASSOCIATE-NEXT: [[ARRAYIDX_J_2:%.*]] = getelementptr inbounds double, ptr [[CELLS]], i64 [[IDXPROM_J_2]] +; LICM_AFTER_REASSOCIATE-NEXT: [[CELL_2:%.*]] = load double, ptr [[ARRAYIDX_J_2]], align 8 +; LICM_AFTER_REASSOCIATE-NEXT: [[CELL_3:%.*]] = load double, ptr [[ARRAYIDX_J_2]], align 8 +; LICM_AFTER_REASSOCIATE-NEXT: [[IDXPROM_J:%.*]] = zext i32 [[J]] to i64 +; LICM_AFTER_REASSOCIATE-NEXT: [[ARRAYIDX_J:%.*]] = getelementptr inbounds double, ptr [[CELLS]], i64 [[IDXPROM_J]] +; LICM_AFTER_REASSOCIATE-NEXT: [[CELL_4:%.*]] = load double, ptr [[ARRAYIDX_J]], align 8 +; LICM_AFTER_REASSOCIATE-NEXT: [[FMUL_1:%.*]] = fmul fast double [[CELL_1]], [[D1]] +; LICM_AFTER_REASSOCIATE-NEXT: [[FMUL_2:%.*]] = fmul fast double [[CELL_4]], [[D2]] +; LICM_AFTER_REASSOCIATE-NEXT: [[EXTRA_MUL:%.*]] = fmul fast double [[CELL_3]], [[CELL_2]] +; LICM_AFTER_REASSOCIATE-NEXT: [[REASS_ADD:%.*]] = fadd fast double [[EXTRA_MUL]], [[FMUL_1]] +; LICM_AFTER_REASSOCIATE-NEXT: [[EXTRA_ADD:%.*]] = fadd fast double [[REASS_ADD]], [[FMUL_2]] +; LICM_AFTER_REASSOCIATE-NEXT: [[REASS_MUL:%.*]] = fmul fast double [[EXTRA_ADD]], [[DELTA]] +; LICM_AFTER_REASSOCIATE-NEXT: store double [[REASS_MUL]], ptr [[ARRAYIDX_J]], align 8 +; LICM_AFTER_REASSOCIATE-NEXT: br label [[FOR_COND]] +; LICM_AFTER_REASSOCIATE: for.end: +; LICM_AFTER_REASSOCIATE-NEXT: ret void +; +entry: + br label %for.cond + +for.cond: + %j = phi i32 [ 0, %entry ], [ %add.j.1, %for.body ] + %cmp.not = icmp sgt i32 %j, %i + br i1 %cmp.not, label %for.end, label %for.body + +for.body: + %add.j.1 = add nuw nsw i32 %j, 1 + %idxprom.j.1 = zext i32 %add.j.1 to i64 + %arrayidx.j.1 = getelementptr inbounds double, ptr %cells, i64 %idxprom.j.1 + %cell.1 = load double, ptr %arrayidx.j.1, align 8 + %add.j.2 = add nuw nsw i32 %j, 2 + %idxprom.j.2 = zext i32 %add.j.1 to i64 + %arrayidx.j.2 = getelementptr inbounds double, ptr %cells, i64 %idxprom.j.2 + %cell.2 = load double, ptr %arrayidx.j.2, align 8 + %add.j.3 = add nuw nsw i32 %j, 3 + %idxprom.j.3 = zext i32 %add.j.1 to i64 + %arrayidx.j.3 = getelementptr inbounds double, ptr %cells, i64 %idxprom.j.3 + %cell.3 = load double, ptr %arrayidx.j.2, align 8 + %idxprom.j = zext i32 %j to i64 + %arrayidx.j = getelementptr inbounds double, ptr %cells, i64 %idxprom.j + %cell.4 = load double, ptr %arrayidx.j, align 8 + %fmul.1 = fmul fast double %cell.1, %d1 + %fmul.2 = fmul fast double %cell.4, %d2 + %reass.add = fadd fast double %fmul.2, %fmul.1 + %extra.mul = fmul fast double %cell.3, %cell.2 + %extra.add = fadd fast double %extra.mul, %reass.add + %reass.mul = fmul fast double %extra.add, %delta + store double %reass.mul, ptr %arrayidx.j, align 8 + br label %for.cond + +for.end: + ret void +}