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New testcase for missed optimization

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10538 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2003-12-19 09:08:15 +00:00
parent 539ca70112
commit 7fe178681b
1 changed files with 28 additions and 0 deletions
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test/Transforms/ADCE/2003-12-19-MergeReturn.llx Normal file
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; This testcase was failing because without merging the return blocks, ADCE
; didn't know that it could get rid of the then.0 block.
; RUN: llvm-as < %s | opt -adce | llvm-dis | not grep load
implementation ; Functions:
void %main(uint %argc, sbyte** %argv) {
entry:
call void %__main( )
%tmp.1 = setle uint %argc, 5 ; <bool> [#uses=1]
br bool %tmp.1, label %then.0, label %return
then.0: ; preds = %entry
%tmp.8 = load sbyte** %argv ; <sbyte*> [#uses=1]
%tmp.10 = load sbyte* %tmp.8 ; <sbyte> [#uses=1]
%tmp.11 = seteq sbyte %tmp.10, 98 ; <bool> [#uses=1]
br bool %tmp.11, label %then.1, label %return
then.1: ; preds = %then.0
ret void
return: ; preds = %entry, %then.0
ret void
}
declare void %__main()