2020-06-26 20:41:37 -07:00
|
|
|
; RUN: opt -S -basic-aa -objc-arc-aa -gvn < %s | FileCheck %s
|
2020-09-26 00:18:42 -07:00
|
|
|
; RUN: opt -S -aa-pipeline=basic-aa,objc-arc-aa -passes=gvn < %s | FileCheck %s
|
2019-04-17 04:52:47 +00:00
|
|
|
|
|
|
|
|
@x = common global i8* null, align 8
|
|
|
|
|
|
|
|
|
|
declare i8* @llvm.objc.retain(i8*)
|
|
|
|
|
declare i32 @llvm.objc.sync.enter(i8*)
|
|
|
|
|
declare i32 @llvm.objc.sync.exit(i8*)
|
|
|
|
|
|
|
|
|
|
; GVN should be able to eliminate this redundant load, with ARC-specific
|
|
|
|
|
; alias analysis.
|
|
|
|
|
|
|
|
|
|
; CHECK: define i8* @test0(i32 %n)
|
|
|
|
|
; CHECK-NEXT: entry:
|
|
|
|
|
; CHECK-NEXT: %s = load i8*, i8** @x
|
|
|
|
|
; CHECK-NOT: load
|
|
|
|
|
; CHECK: ret i8* %s
|
|
|
|
|
; CHECK-NEXT: }
|
|
|
|
|
define i8* @test0(i32 %n) nounwind {
|
|
|
|
|
entry:
|
|
|
|
|
%s = load i8*, i8** @x
|
|
|
|
|
%0 = tail call i8* @llvm.objc.retain(i8* %s) nounwind
|
|
|
|
|
%t = load i8*, i8** @x
|
|
|
|
|
ret i8* %t
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
; GVN should not be able to eliminate this redundant load, with ARC-specific
|
|
|
|
|
; alias analysis.
|
|
|
|
|
|
|
|
|
|
; CHECK-LABEL: define i8* @test1(
|
|
|
|
|
; CHECK: load
|
|
|
|
|
; CHECK: load
|
|
|
|
|
; CHECK: ret i8* %t
|
|
|
|
|
; CHECK: }
|
|
|
|
|
define i8* @test1(i32 %n) nounwind {
|
|
|
|
|
entry:
|
|
|
|
|
%s = load i8*, i8** @x
|
|
|
|
|
%0 = call i32 @llvm.objc.sync.enter(i8* %s)
|
|
|
|
|
%t = load i8*, i8** @x
|
|
|
|
|
%1 = call i32 @llvm.objc.sync.exit(i8* %s)
|
|
|
|
|
ret i8* %t
|
|
|
|
|
}
|
