llvm/test/Transforms/InstCombine/deadcode.ll
Chris Lattner 741c0aea08 dead calls to llvm.stacksave can be deleted, even though they
have potential side-effects.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45392 91177308-0d34-0410-b5e6-96231b3b80d8
2007-12-29 00:59:12 +00:00

25 lines
532 B
LLVM

; RUN: llvm-as < %s | opt -instcombine | llvm-dis | grep {ret i32 %A}
; RUN: llvm-as < %s | opt -die | llvm-dis | not grep call.*llvm.stacksave
define i32 @test(i32 %A) {
%X = or i1 false, false
br i1 %X, label %T, label %C
T: ; preds = %0
%B = add i32 %A, 1
br label %C
C: ; preds = %T, %0
%C.upgrd.1 = phi i32 [ %B, %T ], [ %A, %0 ]
ret i32 %C.upgrd.1
}
define i32* @test2(i32 %width) {
%tmp = call i8* @llvm.stacksave( )
%tmp14 = alloca i32, i32 %width
ret i32* %tmp14
}
declare i8* @llvm.stacksave()