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Don't crash if the load/store pointer is not a GEP.

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Fix by Shivarama Rao <Shivarama.Rao@amd.com>



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@166427 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Nadav Rotem 2012-10-22 18:27:56 +00:00
parent 81750822f4
commit 782090aa02
2 changed files with 58 additions and 1 deletions
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2
lib/Transforms/Vectorize/LoopVectorize.cpp
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@ -389,7 +389,7 @@ Value *SingleBlockLoopVectorizer::getConsecutiveVector(Value* Val) {
}
bool LoopVectorizationLegality::isConsecutiveGep(Value *Ptr) {
GetElementPtrInst *Gep = dyn_cast<GetElementPtrInst>(Ptr);
GetElementPtrInst *Gep = dyn_cast_or_null<GetElementPtrInst>(Ptr);
if (!Gep)
return false;

57
test/Transforms/LoopVectorize/2012-10-22-isconsec.ll Normal file
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@ -0,0 +1,57 @@
; RUN: opt < %s -loop-vectorize -dce
; Check that we don't crash.
target datalayout = "e-p:64:64:64-S128-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f16:16:16-f32:32:32-f64:64:64-f128:128:128-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
target triple = "x86_64-unknown-linux-gnu"
module asm "\09.ident\09\22GCC: (GNU) 4.6.3 LLVM: 3.2svn\22"
@b = common global [32000 x float] zeroinitializer, align 16
define i32 @set1ds(i32 %_n, float* nocapture %arr, float %value, i32 %stride) nounwind uwtable {
entry:
%0 = icmp sgt i32 %_n, 0
br i1 %0, label %"3.lr.ph", label %"5"
"3.lr.ph": ; preds = %entry
%1 = bitcast float* %arr to i8*
%2 = sext i32 %stride to i64
br label %"3"
"3": ; preds = %"3.lr.ph", %"3"
%indvars.iv = phi i64 [ 0, %"3.lr.ph" ], [ %indvars.iv.next, %"3" ]
%3 = shl nsw i64 %indvars.iv, 2
%4 = getelementptr inbounds i8* %1, i64 %3
%5 = bitcast i8* %4 to float*
store float %value, float* %5, align 4, !tbaa !0
%indvars.iv.next = add i64 %indvars.iv, %2
%6 = trunc i64 %indvars.iv.next to i32
%7 = icmp slt i32 %6, %_n
br i1 %7, label %"3", label %"5"
"5": ; preds = %"3", %entry
ret i32 0
}
define i32 @init(i8* nocapture %name) unnamed_addr nounwind uwtable {
entry:
br label %"3"
"3": ; preds = %"3", %entry
%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %"3" ]
%0 = shl nsw i64 %indvars.iv, 2
%1 = getelementptr inbounds i8* bitcast (float* getelementptr inbounds ([32000 x float]* @b, i64 0, i64 16000) to i8*), i64 %0
%2 = bitcast i8* %1 to float*
store float -1.000000e+00, float* %2, align 4, !tbaa !0
%indvars.iv.next = add i64 %indvars.iv, 1
%lftr.wideiv = trunc i64 %indvars.iv.next to i32
%exitcond = icmp eq i32 %lftr.wideiv, 16000
br i1 %exitcond, label %"5", label %"3"
"5": ; preds = %"3"
ret i32 0
}
!0 = metadata !{metadata !"alias set 7: float", metadata !1}
!1 = metadata !{metadata !1}