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Test case for the recently fixed FindModifiedNodeSlot bug.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30877 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng 2006-10-11 07:01:37 +00:00
parent 3cd5ca6c72
commit 27b1bb999b
1 changed files with 31 additions and 0 deletions
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test/CodeGen/X86/2006-10-10-FindModifiedNodeSlotBug.ll Normal file
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@ -0,0 +1,31 @@
; RUN: llvm-as < %s | llc -march=x86 | grep shrl
; Bug in FindModifiedNodeSlot cause tmp14 load to become a zextload and shr 31
; is then optimized away.
%tree_code_type = external global [0 x uint]
void %copy_if_shared_r() {
%tmp = load uint* null
%tmp56 = and uint %tmp, 255
%tmp8 = getelementptr [0 x uint]* %tree_code_type, int 0, uint %tmp56
%tmp9 = load uint* %tmp8
%tmp10 = add uint %tmp9, 4294967295
%tmp = setgt uint %tmp10, 2
%tmp14 = load uint* null
%tmp15 = shr uint %tmp14, ubyte 31
%tmp15 = cast uint %tmp15 to ubyte
%tmp16 = setne ubyte %tmp15, 0
br bool %tmp, label %cond_false25, label %cond_true
cond_true:
br bool %tmp16, label %cond_true17, label %cond_false
cond_true17:
ret void
cond_false:
ret void
cond_false25:
ret void
}