[llvm-commits] [llvm] r84402 - /llvm/trunk/test/Analysis/BasicAA/modref.ll
Chris Lattner
sabre at nondot.org
Sat Oct 17 21:55:26 PDT 2009
Author: lattner
Date: Sat Oct 17 23:55:26 2009
New Revision: 84402
URL: http://llvm.org/viewvc/llvm-project?rev=84402&view=rev
Log:
tighten up test3, add test3a for the converse
transform, which isn't happening yet.
Modified:
llvm/trunk/test/Analysis/BasicAA/modref.ll
Modified: llvm/trunk/test/Analysis/BasicAA/modref.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/Analysis/BasicAA/modref.ll?rev=84402&r1=84401&r2=84402&view=diff
==============================================================================
--- llvm/trunk/test/Analysis/BasicAA/modref.ll (original)
+++ llvm/trunk/test/Analysis/BasicAA/modref.ll Sat Oct 17 23:55:26 2009
@@ -51,7 +51,10 @@
define i8 @test2a(i8* %P) {
; CHECK: @test2
%P2 = getelementptr i8* %P, i32 126
+
+ ;; FIXME: DSE isn't zapping this dead store.
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
@@ -59,14 +62,30 @@
; CHECK: ret i8 %A
}
-define void @test3(i8* %P) {
+define void @test3(i8* %P, i8 %X) {
; CHECK: @test3
+; CHECK-NOT: store
+; CHECK-NOT: %Y
+ %Y = add i8 %X, 1 ;; Dead, because the only use (the store) is dead.
+
%P2 = getelementptr i8* %P, i32 2
- store i8 1, i8* %P2 ;; Not read by lifetime.end
-; CHECK: store
+ store i8 %Y, i8* %P2 ;; Not read by lifetime.end, should be removed.
+; CHECK: store i8 2, i8* %P2
call void @llvm.lifetime.end(i64 1, i8* %P)
store i8 2, i8* %P2
; CHECK-NOT: store
ret void
; CHECK: ret void
+}
+
+define void @test3a(i8* %P, i8 %X) {
+; CHECK: @test3a
+ %Y = add i8 %X, 1 ;; Dead, because the only use (the store) is dead.
+
+ %P2 = getelementptr i8* %P, i32 2
+ store i8 %Y, i8* %P2 ;; FIXME: Killed by llvm.lifetime.end, should be zapped.
+; CHECK: store i8 2, i8* %P2
+ call void @llvm.lifetime.end(i64 10, i8* %P)
+ ret void
+; CHECK: ret void
}
\ No newline at end of file
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