[llvm-bugs] [Bug 48298] New: MSAN assertion failure during instrumentation of avx512 intrinsic

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=48298

            Bug ID: 48298
           Summary: MSAN assertion failure during instrumentation of
                    avx512 intrinsic
           Product: new-bugs
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: new bugs
          Assignee: unassignedbugs at nondot.org
          Reporter: tomasz.miasko at gmail.com
                CC: htmldeveloper at gmail.com, llvm-bugs at lists.llvm.org

Originally reported in https://github.com/rust-lang/stdarch/issues/957

#include <immintrin.h>

unsigned test_mm_cvt_roundss_u32(__m128 __A) {
  return _mm_cvt_roundss_u32(__A, _MM_FROUND_TO_ZERO | _MM_FROUND_NO_EXC);
}

$ clang a.c -march=skylake-avx512 -fsanitize=memory
clang: llvm/lib/Transforms/Instrumentation/MemorySanitizer.cpp:2783: void
{anonymous}::MemorySanitizerVisitor::handleVectorConvertIntrinsic(llvm::IntrinsicInst&,
int): Assertion `CopyOp->getType() == I.getType()' failed.

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