derek.holloway
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68 lines
2.3 KiB
LLVM
68 lines
2.3 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
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; RUN: opt -p="simplifycfg<sink-common-insts>" -S < %s | FileCheck %s
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;; Verify that fake uses are not ignored when sinking instructions in
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;; SimplifyCFG; when a fake use appears in only one incoming block they prevent
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;; further sinking, and when identical fake uses appear on both sides they
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;; are sunk normally.
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target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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define void @foo(i1 %bool, ptr %p) {
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; CHECK-LABEL: define void @foo(
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; CHECK-SAME: i1 [[BOOL:%.*]], ptr [[P:%.*]]) {
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; CHECK-NEXT: [[ENTRY:.*:]]
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; CHECK-NEXT: br i1 [[BOOL]], label %[[IF_ELSE:.*]], label %[[IF_THEN:.*]]
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; CHECK: [[COMMON_RET:.*]]:
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; CHECK-NEXT: ret void
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; CHECK: [[IF_THEN]]:
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; CHECK-NEXT: store ptr [[P]], ptr [[P]], align 8
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; CHECK-NEXT: br label %[[COMMON_RET]]
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; CHECK: [[IF_ELSE]]:
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; CHECK-NEXT: store ptr [[P]], ptr [[P]], align 8
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; CHECK-NEXT: notail call void (...) @llvm.fake.use(ptr [[P]])
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; CHECK-NEXT: br label %[[COMMON_RET]]
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;
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entry:
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br i1 %bool, label %if.else, label %if.then
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common.ret: ; preds = %if.else, %if.then
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ret void
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if.then: ; preds = %entry
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store ptr %p, ptr %p, align 8
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br label %common.ret
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if.else: ; preds = %entry
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store ptr %p, ptr %p, align 8
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notail call void (...) @llvm.fake.use(ptr %p)
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br label %common.ret
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}
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define void @bar(i1 %bool, ptr %p) {
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; CHECK-LABEL: define void @bar(
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; CHECK-SAME: i1 [[BOOL:%.*]], ptr [[P:%.*]]) {
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; CHECK-NEXT: [[ENTRY:.*:]]
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; CHECK-NEXT: store ptr [[P]], ptr [[P]], align 8
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; CHECK-NEXT: notail call void (...) @llvm.fake.use(ptr [[P]])
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; CHECK-NEXT: ret void
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;
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entry:
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br i1 %bool, label %if.else, label %if.then
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common.ret: ; preds = %if.else, %if.then
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ret void
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if.then: ; preds = %entry
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store ptr %p, ptr %p, align 8
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notail call void (...) @llvm.fake.use(ptr %p)
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br label %common.ret
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if.else: ; preds = %entry
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store ptr %p, ptr %p, align 8
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notail call void (...) @llvm.fake.use(ptr %p)
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br label %common.ret
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}
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