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fix rdar://6762290, a crash compiling cxx filt with clang. 

llvm-svn: 68500
This commit is contained in:
Chris Lattner 2009-04-07 05:03:34 +00:00
parent 8928d74e19
commit 321741af5f
2 changed files with 28 additions and 3 deletions
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7
llvm/lib/Transforms/Scalar/InstructionCombining.cpp
View File

@ -5223,10 +5223,11 @@ static Value *EmitGEPOffset(User *GEP, Instruction &I, InstCombiner &IC) {
// Convert to correct type.
if (Op->getType() != IntPtrTy) {
if (Constant *OpC = dyn_cast<Constant>(Op))
Op = ConstantExpr::getSExt(OpC, IntPtrTy);
Op = ConstantExpr::getIntegerCast(OpC, IntPtrTy, true);
else
Op = IC.InsertNewInstBefore(new SExtInst(Op, IntPtrTy,
Op->getName()+".c"), I);
Op = IC.InsertNewInstBefore(CastInst::CreateIntegerCast(Op, IntPtrTy,
true,
Op->getName()+".c"), I);
}
if (Size != 1) {
Constant *Scale = ConstantInt::get(IntPtrTy, Size);

24
llvm/test/Transforms/InstCombine/2009-04-06-GEP-Index-Crash.ll Normal file
View File

@ -0,0 +1,24 @@
; RUN: llvm-as < %s | opt -instcombine | llvm-dis
; rdar://6762290
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-darwin9"
%T = type <{ i64, i64, i64 }>
define i32 @test(i8* %start, i32 %X) nounwind {
entry:
%tmp3 = load i64* null ; <i64> [#uses=1]
%add.ptr = getelementptr i8* %start, i64 %tmp3 ; <i8*> [#uses=1]
%tmp158 = load i32* null ; <i32> [#uses=1]
%add.ptr159 = getelementptr %T* null, i32 %tmp158
%add.ptr209 = getelementptr i8* %start, i64 0 ; <i8*> [#uses=1]
%add.ptr212 = getelementptr i8* %add.ptr209, i32 %X ; <i8*> [#uses=1]
%cmp214 = icmp ugt i8* %add.ptr212, %add.ptr ; <i1> [#uses=1]
br i1 %cmp214, label %if.then216, label %if.end363
if.then216: ; preds = %for.body162
ret i32 1
if.end363: ; preds = %for.body162
ret i32 0
}