https://bugs.llvm.org/show_bug.cgi?id=39849
Bug ID: 39849
Summary: Clang crashes when using C90 __restrict keyword
Product: clang
Version: trunk
Hardware: PC
OS: All
Status: NEW
Severity: normal
Priority: P
Component: C++
Assignee: unassignedclangb...@nondot.org
Reporter: gui...@berkeley.edu
CC: blitzrak...@gmail.com, dgre...@apple.com,
erik.pilking...@gmail.com, llvm-bugs@lists.llvm.org,
richard-l...@metafoo.co.uk
Created attachment 21181
--> https://bugs.llvm.org/attachment.cgi?id=21181&action=edit
Source and preprocessed files for the two cases, triggering different crashes.
[Note: Decompresses to current directory]
https://godbolt.org/z/j_WU8P
Minimal code is:
#include <immintrin.h>
struct S { __m128 operator + (const __m128 r) const { return r+l; } };
struct A
{
S s;
__m128 v;
void f(A& /*__restrict*/ a) __restrict __attribute__((used)) { v += s+a.v; }
};
int main() { return 0; }
Reporting two different crashes (files t1.cpp, t2.cpp attached).
Commenting in/out the first '__restrict' does not affect the result.
It's the second '__restrict' (the one affecting 'this') that triggers the bug.
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