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