derek.holloway
7502bf64a4
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47 lines
1.3 KiB
LLVM
47 lines
1.3 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -passes=newgvn -S | FileCheck %s
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; github issue #56039
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define i8 @src(ptr %a, ptr %b, i1 %c) {
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; CHECK-LABEL: @src(
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; CHECK-NEXT: br i1 [[C:%.*]], label [[BB1:%.*]], label [[BB2:%.*]]
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; CHECK: bb1:
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; CHECK-NEXT: [[LB1:%.*]] = load i8, ptr [[B:%.*]], align 1
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; CHECK-NEXT: [[TOBOOL3_NOT_I:%.*]] = icmp eq i8 [[LB1]], 0
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; CHECK-NEXT: br i1 [[TOBOOL3_NOT_I]], label [[BB4:%.*]], label [[BB3:%.*]]
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; CHECK: bb2:
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; CHECK-NEXT: [[LB2:%.*]] = load i8, ptr [[B]], align 1
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; CHECK-NEXT: [[CMP_NOT_I:%.*]] = icmp ult i8 0, [[LB2]]
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; CHECK-NEXT: tail call void @llvm.assume(i1 [[CMP_NOT_I]])
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; CHECK-NEXT: br label [[BB3]]
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; CHECK: bb3:
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; CHECK-NEXT: [[LA:%.*]] = load i8, ptr [[A:%.*]], align 1
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; CHECK-NEXT: br label [[BB4]]
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; CHECK: bb4:
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; CHECK-NEXT: ret i8 0
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;
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br i1 %c, label %bb1, label %bb2
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bb1:
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%lb1 = load i8, ptr %b
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%tobool3.not.i = icmp eq i8 %lb1, 0
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br i1 %tobool3.not.i, label %bb4, label %bb3
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bb2:
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%lb2 = load i8, ptr %b
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%cmp.not.i = icmp ult i8 0, %lb2
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tail call void @llvm.assume(i1 %cmp.not.i)
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br label %bb3
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bb3:
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%p = phi i8 [ %lb1, %bb1 ], [ %lb2, %bb2 ]
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%la = load i8, ptr %a
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%xor = xor i8 %la, %p
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br label %bb4
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bb4:
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ret i8 0
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}
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declare void @llvm.assume(i1)
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