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Differential D143721 Diff 496401 llvm/test/Transforms/InstCombine/simple_phi_condition.ll

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llvm/test/Transforms/InstCombine/simple_phi_condition.ll

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sw.7: sw.7:
br label %merge br label %merge
sw.19: sw.19:
br label %merge br label %merge
merge: merge:
%ret = phi i8 [ 1, %sw.1 ], [ 7, %sw.7 ], [ 19, %sw.19 ] %ret = phi i8 [ 1, %sw.1 ], [ 7, %sw.7 ], [ 19, %sw.19 ]
ret i8 %ret ret i8 %ret
} }
define i32 @switch_to_sext(i8 noundef %0) {
; CHECK-LABEL: @switch_to_sext(
; CHECK-NEXT: switch i8 [[TMP0:%.*]], label [[BB2:%.*]] [
; CHECK-NEXT: i8 -1, label [[BB3:%.*]]
; CHECK-NEXT: i8 0, label [[BB4:%.*]]
; CHECK-NEXT: i8 1, label [[BB1:%.*]]
; CHECK-NEXT: ]
; CHECK: bb2:
; CHECK-NEXT: unreachable
; CHECK: bb3:
; CHECK-NEXT: br label [[BB5:%.*]]
; CHECK: bb4:
; CHECK-NEXT: br label [[BB5]]
; CHECK: bb1:
; CHECK-NEXT: br label [[BB5]]
; CHECK: bb5:
; CHECK-NEXT: [[DOT0:%.*]] = phi i32 [ 1, [[BB1]] ], [ 0, [[BB4]] ], [ -1, [[BB3]] ]
; CHECK-NEXT: ret i32 [[DOT0]]
;
switch i8 %0, label %bb2 [
i8 -1, label %bb3
i8 0, label %bb4
i8 1, label %bb1
]
bb2: ; preds = %start
unreachable
bb3: ; preds = %start
br label %bb5
bb4: ; preds = %start
br label %bb5
bb1: ; preds = %start
br label %bb5
bb5: ; preds = %bb1, %bb4, %bb3
%.0 = phi i32 [ 1, %bb1 ], [ 0, %bb4 ], [ -1, %bb3 ]
ret i32 %.0
}
define i32 @switch_to_zext(i8 noundef %0) {
; CHECK-LABEL: @switch_to_zext(
; CHECK-NEXT: switch i8 [[TMP0:%.*]], label [[BB2:%.*]] [
; CHECK-NEXT: i8 -1, label [[BB3:%.*]]
; CHECK-NEXT: i8 0, label [[BB4:%.*]]
; CHECK-NEXT: i8 1, label [[BB1:%.*]]
; CHECK-NEXT: ]
; CHECK: bb2:
; CHECK-NEXT: unreachable
; CHECK: bb3:
; CHECK-NEXT: br label [[BB5:%.*]]
; CHECK: bb4:
; CHECK-NEXT: br label [[BB5]]
; CHECK: bb1:
; CHECK-NEXT: br label [[BB5]]
; CHECK: bb5:
; CHECK-NEXT: [[DOT0:%.*]] = phi i32 [ 1, [[BB1]] ], [ 0, [[BB4]] ], [ 255, [[BB3]] ]
; CHECK-NEXT: ret i32 [[DOT0]]
;
switch i8 %0, label %bb2 [
i8 -1, label %bb3
i8 0, label %bb4
i8 1, label %bb1
]
bb2: ; preds = %start
unreachable
bb3: ; preds = %start
br label %bb5
bb4: ; preds = %start
br label %bb5
bb1: ; preds = %start
br label %bb5
bb5: ; preds = %bb1, %bb4, %bb3
%.0 = phi i32 [ 1, %bb1 ], [ 0, %bb4 ], [ 255, %bb3 ]
ret i32 %.0
}
define i8 @switch_to_trunc(i32 noundef %0) {
; CHECK-LABEL: @switch_to_trunc(
; CHECK-NEXT: switch i32 [[TMP0:%.*]], label [[BB2:%.*]] [
; CHECK-NEXT: i32 -1, label [[BB3:%.*]]
; CHECK-NEXT: i32 0, label [[BB4:%.*]]
; CHECK-NEXT: i32 1, label [[BB1:%.*]]
; CHECK-NEXT: ]
; CHECK: bb2:
; CHECK-NEXT: unreachable
; CHECK: bb3:
; CHECK-NEXT: br label [[BB5:%.*]]
; CHECK: bb4:
; CHECK-NEXT: br label [[BB5]]
; CHECK: bb1:
; CHECK-NEXT: br label [[BB5]]
; CHECK: bb5:
; CHECK-NEXT: [[DOT0:%.*]] = phi i8 [ 1, [[BB1]] ], [ 0, [[BB4]] ], [ -1, [[BB3]] ]
; CHECK-NEXT: ret i8 [[DOT0]]
;
switch i32 %0, label %bb2 [
i32 -1, label %bb3
i32 0, label %bb4
i32 1, label %bb1
]
bb2: ; preds = %start
unreachable
bb3: ; preds = %start
br label %bb5
bb4: ; preds = %start
br label %bb5
bb1: ; preds = %start
br label %bb5
bb5: ; preds = %bb1, %bb4, %bb3
%.0 = phi i8 [ 1, %bb1 ], [ 0, %bb4 ], [ -1, %bb3 ]
ret i8 %.0
}
define i32 @switch_to_sext_invert(i8 noundef %0) {
; CHECK-LABEL: @switch_to_sext_invert(
; CHECK-NEXT: switch i8 [[TMP0:%.*]], label [[BB2:%.*]] [
; CHECK-NEXT: i8 -1, label [[BB3:%.*]]
; CHECK-NEXT: i8 0, label [[BB4:%.*]]
; CHECK-NEXT: i8 1, label [[BB1:%.*]]
; CHECK-NEXT: ]
; CHECK: bb2:
; CHECK-NEXT: unreachable
; CHECK: bb3:
; CHECK-NEXT: br label [[BB5:%.*]]
; CHECK: bb4:
; CHECK-NEXT: br label [[BB5]]
; CHECK: bb1:
; CHECK-NEXT: br label [[BB5]]
; CHECK: bb5:
; CHECK-NEXT: [[DOT0:%.*]] = phi i32 [ -2, [[BB1]] ], [ -1, [[BB4]] ], [ 0, [[BB3]] ]
; CHECK-NEXT: ret i32 [[DOT0]]
;
switch i8 %0, label %bb2 [
i8 -1, label %bb3
i8 0, label %bb4
i8 1, label %bb1
]
bb2: ; preds = %start
unreachable
bb3: ; preds = %start
br label %bb5
bb4: ; preds = %start
br label %bb5
bb1: ; preds = %start
br label %bb5
bb5: ; preds = %bb1, %bb4, %bb3
%.0 = phi i32 [ -2, %bb1 ], [ -1, %bb4 ], [ 0, %bb3 ]
ret i32 %.0
}
define i32 @switch_to_zext_invert(i8 noundef %0) {
; CHECK-LABEL: @switch_to_zext_invert(
; CHECK-NEXT: switch i8 [[TMP0:%.*]], label [[BB2:%.*]] [
; CHECK-NEXT: i8 -1, label [[BB3:%.*]]
; CHECK-NEXT: i8 0, label [[BB4:%.*]]
; CHECK-NEXT: i8 1, label [[BB1:%.*]]
; CHECK-NEXT: ]
; CHECK: bb2:
; CHECK-NEXT: unreachable
; CHECK: bb3:
; CHECK-NEXT: br label [[BB5:%.*]]
; CHECK: bb4:
; CHECK-NEXT: br label [[BB5]]
; CHECK: bb1:
; CHECK-NEXT: br label [[BB5]]
; CHECK: bb5:
; CHECK-NEXT: [[DOT0:%.*]] = phi i32 [ -2, [[BB1]] ], [ -1, [[BB4]] ], [ -256, [[BB3]] ]
; CHECK-NEXT: ret i32 [[DOT0]]
;
switch i8 %0, label %bb2 [
i8 -1, label %bb3
i8 0, label %bb4
i8 1, label %bb1
]
bb2: ; preds = %start
unreachable
bb3: ; preds = %start
br label %bb5
bb4: ; preds = %start
br label %bb5
bb1: ; preds = %start
br label %bb5
bb5: ; preds = %bb1, %bb4, %bb3
%.0 = phi i32 [ -2, %bb1 ], [ -1, %bb4 ], [ -256, %bb3 ]
ret i32 %.0
}
define i8 @switch_to_trunc_invert(i32 noundef %0) {
; CHECK-LABEL: @switch_to_trunc_invert(
; CHECK-NEXT: switch i32 [[TMP0:%.*]], label [[BB2:%.*]] [
; CHECK-NEXT: i32 -1, label [[BB3:%.*]]
; CHECK-NEXT: i32 0, label [[BB4:%.*]]
; CHECK-NEXT: i32 1, label [[BB1:%.*]]
; CHECK-NEXT: ]
; CHECK: bb2:
; CHECK-NEXT: unreachable
; CHECK: bb3:
; CHECK-NEXT: br label [[BB5:%.*]]
; CHECK: bb4:
; CHECK-NEXT: br label [[BB5]]
; CHECK: bb1:
; CHECK-NEXT: br label [[BB5]]
; CHECK: bb5:
; CHECK-NEXT: [[DOT0:%.*]] = phi i8 [ -2, [[BB1]] ], [ -1, [[BB4]] ], [ 0, [[BB3]] ]
; CHECK-NEXT: ret i8 [[DOT0]]
;
switch i32 %0, label %bb2 [
i32 -1, label %bb3
i32 0, label %bb4
i32 1, label %bb1
]
bb2: ; preds = %start
unreachable
bb3: ; preds = %start
br label %bb5
bb4: ; preds = %start
br label %bb5
bb1: ; preds = %start
br label %bb5
bb5: ; preds = %bb1, %bb4, %bb3
%.0 = phi i8 [ -2, %bb1 ], [ -1, %bb4 ], [ 0, %bb3 ]
ret i8 %.0
}