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llvm-mirror/test/Transforms/GVN/null-aliases-nothing.ll
Dan Gohman 6aff5b94ff Make BasicAliasAnalysis a normal AliasAnalysis implementation which
does normal initialization and normal chaining. Change the default
AliasAnalysis implementation to NoAlias.

Update StandardCompileOpts.h and friends to explicitly request
BasicAliasAnalysis.

Update tests to explicitly request -basicaa.

llvm-svn: 116720
2010-10-18 18:04:47 +00:00

21 lines
441 B
LLVM

; RUN: opt %s -basicaa -gvn -S | FileCheck %s
%t = type { i32 }
declare void @test1f(i8*)
define void @test1(%t* noalias %stuff ) {
%p = getelementptr inbounds %t* %stuff, i32 0, i32 0
%before = load i32* %p
call void @test1f(i8* null)
%after = load i32* %p ; <--- This should be a dead load
%sum = add i32 %before, %after
store i32 %sum, i32* %p
ret void
; CHECK: load
; CHECK-NOT: load
; CHECK: ret void
}