forked from OSchip/llvm-project
52 lines
1.4 KiB
LLVM
52 lines
1.4 KiB
LLVM
; RUN: opt -S -globalopt -o - < %s | FileCheck %s
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; CHECK: [[G_INIT:@.*]] = internal unnamed_addr global i1 false
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@g = internal global i32* null, align 8
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; CHECK-LABEL: define {{.*}} @f1(
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; CHECK-NEXT: [[G_INIT_VAL:%.*]] = load i1, i1* [[G_INIT]], align 1
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; CHECK-NEXT: call fastcc void @f2()
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; CHECK-NEXT: [[NOTINIT:%.*]] = xor i1 [[G_INIT_VAL]], true
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; CHECK-NEXT: br i1 [[NOTINIT]], label [[TMP1:%.*]], label [[TMP2:%.*]]
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;
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define internal i32 @f1() {
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%1 = load i32*, i32** @g, align 8
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call void @f2();
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%2 = icmp eq i32* %1, null
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br i1 %2, label %3, label %4
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3: ; preds = %0
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br label %5
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4: ; preds = %0
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br label %5
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5: ; preds = %3, %4
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%6 = phi i32 [ -1, %3 ], [ 1, %4 ]
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ret i32 %6
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}
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; CHECK-LABEL: define {{.*}} @f2(
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; CHECK-NEXT: store i1 true, i1* [[G_INIT]], align 1
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; CHECK-NEXT: ret void
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;
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define internal void @f2() {
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%1 = call noalias i8* @malloc(i64 4)
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%2 = bitcast i8* %1 to i32*
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store i32* %2, i32** @g, align 8
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ret void
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}
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; CHECK-LABEL: define {{.*}} @main(
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; CHECK-NEXT: store i1 false, i1* [[G_INIT]], align 1
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; CHECK-NEXT: [[TMP1:%.*]] = call fastcc i32 @f1()
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; CHECK-NEXT: ret i32 [[TMP1]]
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;
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define dso_local i32 @main() {
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store i32* null, i32** @g, align 8
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%1 = call i32 @f1()
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ret i32 %1
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}
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declare dso_local noalias i8* @malloc(i64)
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