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tighten test2, add a test that it doesn't get transformed in the invalid edge case.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84401 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2009-10-18 04:50:18 +00:00
parent 15d3c05adf
commit 6e85d91144
1 changed files with 12 additions and 1 deletions
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13
test/Analysis/BasicAA/modref.ll
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@ -40,7 +40,7 @@ define i8 @test1() {
define i8 @test2(i8* %P) {
; CHECK: @test2
%P2 = getelementptr i8* %P, i32 1000
%P2 = getelementptr i8* %P, i32 127
store i8 1, i8* %P2 ;; Not dead across memset
call void @llvm.memset.i8(i8* %P, i8 2, i8 127, i32 0)
%A = load i8* %P2
@ -48,6 +48,17 @@ define i8 @test2(i8* %P) {
; CHECK: ret i8 1
}
define i8 @test2a(i8* %P) {
; CHECK: @test2
%P2 = getelementptr i8* %P, i32 126
store i8 1, i8* %P2 ;; Dead, clobbered by memset.
call void @llvm.memset.i8(i8* %P, i8 2, i8 127, i32 0)
%A = load i8* %P2
ret i8 %A
; CHECK: %A = load i8* %P2
; CHECK: ret i8 %A
}
define void @test3(i8* %P) {
; CHECK: @test3
%P2 = getelementptr i8* %P, i32 2