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Add a test for my previous PRE fix.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60394 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Owen Anderson 2008-12-02 04:25:42 +00:00
parent 912c49d169
commit e209d9a3e6
1 changed files with 27 additions and 0 deletions
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27
test/Transforms/GVN/pre.ll Normal file
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@ -0,0 +1,27 @@
; RUN: llvm-as < %s | opt -gvn -enable-pre | llvm-dis | grep {.pre}
@H = common global i32 0 ; <i32*> [#uses=2]
@G = common global i32 0 ; <i32*> [#uses=1]
define i32 @test() nounwind {
entry:
%0 = load i32* @H, align 4 ; <i32> [#uses=2]
%1 = call i32 (...)* @foo() nounwind ; <i32> [#uses=1]
%2 = icmp ne i32 %1, 0 ; <i1> [#uses=1]
br i1 %2, label %bb, label %bb1
bb: ; preds = %entry
%3 = add i32 %0, 42 ; <i32> [#uses=1]
store i32 %3, i32* @G, align 4
br label %bb1
bb1: ; preds = %bb, %entry
%4 = add i32 %0, 42 ; <i32> [#uses=1]
store i32 %4, i32* @H, align 4
br label %return
return: ; preds = %bb1
ret i32 0
}
declare i32 @foo(...)