[llvm] r273919 - Fixed crash of SLP Vectorizer on KNL

[Elena Demikhovsky via llvm-commits]

Author: delena
Date: Mon Jun 27 15:07:00 2016
New Revision: 273919

URL: http://llvm.org/viewvc/llvm-project?rev=273919&view=rev
Log:
Fixed crash of SLP Vectorizer on KNL

The bug is connected to vector GEPs.
https://llvm.org/bugs/show_bug.cgi?id=28313


Added:
    llvm/trunk/test/Transforms/SLPVectorizer/X86/crash_knl.ll
Modified:
    llvm/trunk/lib/Transforms/Vectorize/SLPVectorizer.cpp

Modified: llvm/trunk/lib/Transforms/Vectorize/SLPVectorizer.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Transforms/Vectorize/SLPVectorizer.cpp?rev=273919&r1=273918&r2=273919&view=diff
==============================================================================
--- llvm/trunk/lib/Transforms/Vectorize/SLPVectorizer.cpp (original)
+++ llvm/trunk/lib/Transforms/Vectorize/SLPVectorizer.cpp Mon Jun 27 15:07:00 2016
@@ -3765,6 +3765,8 @@ void SLPVectorizerPass::collectSeedInstr
         continue;
       if (!isValidElementType(Idx->getType()))
         continue;
+      if (GEP->getType()->isVectorTy())
+        continue;
       GEPs[GetUnderlyingObject(GEP->getPointerOperand(), *DL)].push_back(GEP);
     }
   }

Added: llvm/trunk/test/Transforms/SLPVectorizer/X86/crash_knl.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/Transforms/SLPVectorizer/X86/crash_knl.ll?rev=273919&view=auto
==============================================================================
--- llvm/trunk/test/Transforms/SLPVectorizer/X86/crash_knl.ll (added)
+++ llvm/trunk/test/Transforms/SLPVectorizer/X86/crash_knl.ll Mon Jun 27 15:07:00 2016
@@ -0,0 +1,17 @@
+;RUN: opt < %s -slp-vectorizer -S
+
+target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-unknown-linux-gnu"
+
+; Function Attrs: noreturn readonly uwtable
+define void @_Z3fn1v(i32 %x, <16 x i32*>%y) local_unnamed_addr #0 {
+entry:
+  %conv42.le = sext i32 %x to i64
+  %conv36109.le = zext i32 2 to i64
+  %VectorGep = getelementptr i32, <16 x i32*> %y, i64 %conv36109.le
+  %VectorGep208 = getelementptr i32, <16 x i32*> %y, i64 %conv42.le
+  unreachable
+}
+
+attributes #0 = { noreturn readonly uwtable "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="knl" "target-features"="+adx,+aes,+avx,+avx2,+avx512cd,+avx512er,+avx512f,+avx512pf,+bmi,+bmi2,+cx16,+f16c,+fma,+fsgsbase,+fxsr,+lzcnt,+mmx,+movbe,+pclmul,+popcnt,+prefetchwt1,+rdrnd,+rdseed,+rtm,+sse,+sse2,+sse3,+sse4.1,+sse4.2,+ssse3,+x87,+xsave,+xsaveopt" "unsafe-fp-math"="false" "use-soft-float"="false" }
+