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Fix rdar://6505632, an llc crash on 483.xalancbmk

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@62470 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2009-01-18 20:35:00 +00:00
parent 15c94d08ab
commit d62284a804
2 changed files with 38 additions and 1 deletions
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3
lib/Transforms/Scalar/CodeGenPrepare.cpp
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@ -688,7 +688,8 @@ bool AddressingModeMatcher::MatchScaledValue(Value *ScaleReg, int64_t Scale,
// to see if ScaleReg is actually X+C. If so, we can turn this into adding
// X*Scale + C*Scale to addr mode.
ConstantInt *CI; Value *AddLHS;
if (match(ScaleReg, m_Add(m_Value(AddLHS), m_ConstantInt(CI)))) {
if (isa<Instruction>(ScaleReg) && // not a constant expr.
match(ScaleReg, m_Add(m_Value(AddLHS), m_ConstantInt(CI)))) {
TestAddrMode.ScaledReg = AddLHS;
TestAddrMode.BaseOffs += CI->getSExtValue()*TestAddrMode.Scale;

36
test/CodeGen/X86/2009-01-18-ConstantExprCrash.ll Normal file
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@ -0,0 +1,36 @@
; RUN: llvm-as < %s | llc
; rdar://6505632
; reduced from 483.xalancbmk
target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128"
target triple = "i386-apple-darwin7"
%"struct.std::basic_ostream<char,std::char_traits<char> >.base" = type { i32 (...)** }
%"struct.xercesc_2_5::ASCIIRangeFactory" = type { %"struct.std::basic_ostream<char,std::char_traits<char> >.base", i8, i8 }
@_ZN11xercesc_2_5L17gIdeographicCharsE = external constant [7 x i16] ; <[7 x i16]*> [#uses=3]
define void @_ZN11xercesc_2_515XMLRangeFactory11buildRangesEv(%"struct.xercesc_2_5::ASCIIRangeFactory"* %this) {
entry:
br i1 false, label %bb5, label %return
bb5: ; preds = %entry
br label %bb4.i.i
bb4.i.i: ; preds = %bb4.i.i, %bb5
br i1 false, label %bb.i51, label %bb4.i.i
bb.i51: ; preds = %bb.i51, %bb4.i.i
br i1 false, label %bb4.i.i70, label %bb.i51
bb4.i.i70: ; preds = %bb4.i.i70, %bb.i51
br i1 false, label %_ZN11xercesc_2_59XMLString9stringLenEPKt.exit.i73, label %bb4.i.i70
_ZN11xercesc_2_59XMLString9stringLenEPKt.exit.i73: ; preds = %bb4.i.i70
%0 = load i16* getelementptr ([7 x i16]* @_ZN11xercesc_2_5L17gIdeographicCharsE, i32 0, i32 add (i32 ashr (i32 sub (i32 ptrtoint (i16* getelementptr ([7 x i16]* @_ZN11xercesc_2_5L17gIdeographicCharsE, i32 0, i32 4) to i32), i32 ptrtoint ([7 x i16]* @_ZN11xercesc_2_5L17gIdeographicCharsE to i32)), i32 1), i32 1)), align 4 ; <i16> [#uses=0]
br label %bb4.i5.i141
bb4.i5.i141: ; preds = %bb4.i5.i141, %_ZN11xercesc_2_59XMLString9stringLenEPKt.exit.i73
br label %bb4.i5.i141
return: ; preds = %entry
ret void
}