derek.holloway
7502bf64a4
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56 lines
1.3 KiB
LLVM
56 lines
1.3 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -passes=gvn -S | FileCheck %s
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define i1 @f(i1 %a) {
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; CHECK-LABEL: @f(
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; CHECK-NEXT: [[B:%.*]] = freeze i1 [[A:%.*]]
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; CHECK-NEXT: ret i1 [[B]]
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;
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%b = freeze i1 %a
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%c = freeze i1 %a
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%d = and i1 %b, %c
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ret i1 %d
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}
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define void @f_multipleuses(i1 %a) {
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; CHECK-LABEL: @f_multipleuses(
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; CHECK-NEXT: [[B:%.*]] = freeze i1 [[A:%.*]]
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; CHECK-NEXT: call void @use1(i1 [[B]])
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; CHECK-NEXT: call void @use1(i1 [[B]])
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; CHECK-NEXT: call void @use1(i1 [[B]])
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; CHECK-NEXT: ret void
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;
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%b = freeze i1 %a
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%c = freeze i1 %a
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call void @use1(i1 %b)
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call void @use1(i1 %c)
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call void @use1(i1 %c)
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ret void
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}
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define void @f_dom(i1 %cond, i1 %a) {
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; CHECK-LABEL: @f_dom(
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; CHECK-NEXT: br i1 [[COND:%.*]], label [[BB1:%.*]], label [[BB2:%.*]]
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; CHECK: BB1:
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; CHECK-NEXT: [[X:%.*]] = freeze i1 [[A:%.*]]
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; CHECK-NEXT: call void @use1(i1 [[X]])
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; CHECK-NEXT: ret void
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; CHECK: BB2:
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; CHECK-NEXT: [[Y:%.*]] = freeze i1 [[A]]
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; CHECK-NEXT: call void @use2(i1 [[Y]])
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; CHECK-NEXT: ret void
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;
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br i1 %cond, label %BB1, label %BB2
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BB1:
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%x = freeze i1 %a
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call void @use1(i1 %x)
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ret void
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BB2:
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%y = freeze i1 %a
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call void @use2(i1 %y) ; cannot use %x
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ret void
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}
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declare void @use1(i1)
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declare void @use2(i1)
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