[LLVMbugs] [Bug 23157] New: Assertion `!Legal->isUniform(SI->getPointerOperand()) && "We do not allow storing to uniform addresses"' failed.

[bugzilla-daemon at llvm.org]

https://llvm.org/bugs/show_bug.cgi?id=23157

            Bug ID: 23157
           Summary: Assertion `!Legal->isUniform(SI->getPointerOperand())
                    && "We do not allow storing to uniform addresses"'
                    failed.
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: Loop Optimizer
          Assignee: unassignedbugs at nondot.org
          Reporter: peter at pcc.me.uk
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

(reduced from chromium third_party/mesa/src/src/mesa/main/texcompress_fxt1.c)

$ cat texcompress.c 
int a, d;
const unsigned char *b[1];
char c[8];
void fn1() {
  const unsigned char **e = b;
  int i;
  for (; a; a++)
    for (; d;)
      for (; i; i++)
        c[i] = *e[a]++;
}
$ ~/src/llvm-build-dbg/bin/clang -O2 texcompress.c 
clang-3.7: /.../lib/Transforms/Vectorize/LoopVectorize.cpp:1834: virtual void
<anonymous
namespace>::InnerLoopVectorizer::vectorizeMemoryInstruction(llvm::Instruction
*): Assertion `!Legal->isUniform(SI->getPointerOperand()) && "We do not allow
storing to uniform addresses"' failed.

Reverting r234361 fixes the assertion failure.

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