Index: llvm/lib/Target/ARM/ARMTargetTransformInfo.cpp =================================================================== --- llvm/lib/Target/ARM/ARMTargetTransformInfo.cpp +++ llvm/lib/Target/ARM/ARMTargetTransformInfo.cpp @@ -1694,7 +1694,8 @@ auto ScanLoop = [&](Loop *L) { for (auto *BB : L->getBlocks()) { for (auto &I : *BB) { - if (maybeLoweredToCall(I) || IsHardwareLoopIntrinsic(I)) { + if (maybeLoweredToCall(I) || IsHardwareLoopIntrinsic(I) || + isa(I)) { LLVM_DEBUG(dbgs() << "ARMHWLoops: Bad instruction: " << I << "\n"); return false; } Index: llvm/test/CodeGen/Thumb2/LowOverheadLoops/inlineasm.ll =================================================================== --- /dev/null +++ llvm/test/CodeGen/Thumb2/LowOverheadLoops/inlineasm.ll @@ -0,0 +1,96 @@ +; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py +; RUN: llc -mtriple=thumbv8.1m.main-none-none-eabi -mattr=+mve -verify-machineinstrs -o - %s | FileCheck %s + +define i32 @test(i16* nocapture readonly %x, i16* nocapture readonly %y, i32 %n) { +; CHECK-LABEL: test: +; CHECK: @ %bb.0: @ %entry +; CHECK-NEXT: .save {r7, lr} +; CHECK-NEXT: push {r7, lr} +; CHECK-NEXT: cmp r2, #1 +; CHECK-NEXT: blt .LBB0_4 +; CHECK-NEXT: @ %bb.1: @ %for.body.preheader +; CHECK-NEXT: mov lr, r0 +; CHECK-NEXT: movs r0, #0 +; CHECK-NEXT: .LBB0_2: @ %for.body +; CHECK-NEXT: @ =>This Inner Loop Header: Depth=1 +; CHECK-NEXT: ldrh r3, [r1], #2 +; CHECK-NEXT: subs r2, #1 +; CHECK-NEXT: ldrh r12, [lr], #2 +; CHECK-NEXT: @APP +; CHECK-NEXT: add r3, r12 +; CHECK-NEXT: @NO_APP +; CHECK-NEXT: add r0, r3 +; CHECK-NEXT: bne .LBB0_2 +; CHECK-NEXT: @ %bb.3: @ %for.cond.cleanup +; CHECK-NEXT: pop {r7, pc} +; CHECK-NEXT: .LBB0_4: +; CHECK-NEXT: movs r0, #0 +; CHECK-NEXT: pop {r7, pc} +entry: + %cmp9 = icmp sgt i32 %n, 0 + br i1 %cmp9, label %for.body, label %for.cond.cleanup + +for.cond.cleanup: ; preds = %for.body, %entry + %s.0.lcssa = phi i32 [ 0, %entry ], [ %add, %for.body ] + ret i32 %s.0.lcssa + +for.body: ; preds = %entry, %for.body + %s.011 = phi i32 [ %add, %for.body ], [ 0, %entry ] + %i.010 = phi i32 [ %inc, %for.body ], [ 0, %entry ] + %arrayidx = getelementptr inbounds i16, i16* %x, i32 %i.010 + %0 = load i16, i16* %arrayidx, align 2 + %arrayidx1 = getelementptr inbounds i16, i16* %y, i32 %i.010 + %1 = load i16, i16* %arrayidx1, align 2 + %2 = tail call i32 asm "add $0, $1, $2", "=r,r,r"(i16 %0, i16 %1) #1 + %add = add nsw i32 %2, %s.011 + %inc = add nuw nsw i32 %i.010, 1 + %exitcond.not = icmp eq i32 %inc, %n + br i1 %exitcond.not, label %for.cond.cleanup, label %for.body +} + +define i32 @testlr(i16* nocapture readonly %x, i16* nocapture readonly %y, i32 %n) { +; CHECK-LABEL: testlr: +; CHECK: @ %bb.0: @ %entry +; CHECK-NEXT: .save {r4, lr} +; CHECK-NEXT: push {r4, lr} +; CHECK-NEXT: cmp r2, #1 +; CHECK-NEXT: blt .LBB1_4 +; CHECK-NEXT: @ %bb.1: @ %for.body.preheader +; CHECK-NEXT: mov r3, r0 +; CHECK-NEXT: movs r0, #0 +; CHECK-NEXT: .LBB1_2: @ %for.body +; CHECK-NEXT: @ =>This Inner Loop Header: Depth=1 +; CHECK-NEXT: ldrh r4, [r1], #2 +; CHECK-NEXT: subs r2, #1 +; CHECK-NEXT: ldrh r12, [r3], #2 +; CHECK-NEXT: @APP +; CHECK-NEXT: add r4, r12 +; CHECK-NEXT: @NO_APP +; CHECK-NEXT: add r0, r4 +; CHECK-NEXT: bne .LBB1_2 +; CHECK-NEXT: @ %bb.3: @ %for.cond.cleanup +; CHECK-NEXT: pop {r4, pc} +; CHECK-NEXT: .LBB1_4: +; CHECK-NEXT: movs r0, #0 +; CHECK-NEXT: pop {r4, pc} +entry: + %cmp9 = icmp sgt i32 %n, 0 + br i1 %cmp9, label %for.body, label %for.cond.cleanup + +for.cond.cleanup: ; preds = %for.body, %entry + %s.0.lcssa = phi i32 [ 0, %entry ], [ %add, %for.body ] + ret i32 %s.0.lcssa + +for.body: ; preds = %entry, %for.body + %s.011 = phi i32 [ %add, %for.body ], [ 0, %entry ] + %i.010 = phi i32 [ %inc, %for.body ], [ 0, %entry ] + %arrayidx = getelementptr inbounds i16, i16* %x, i32 %i.010 + %0 = load i16, i16* %arrayidx, align 2 + %arrayidx1 = getelementptr inbounds i16, i16* %y, i32 %i.010 + %1 = load i16, i16* %arrayidx1, align 2 + %2 = tail call i32 asm "add $0, $1, $2", "=r,r,r,~{lr}"(i16 %0, i16 %1) #1 + %add = add nsw i32 %2, %s.011 + %inc = add nuw nsw i32 %i.010, 1 + %exitcond.not = icmp eq i32 %inc, %n + br i1 %exitcond.not, label %for.cond.cleanup, label %for.body +}