https://bugs.llvm.org/show_bug.cgi?id=50133
Bug ID: 50133
Summary: [MS] Crush when calling intrinsic __cpuid
Product: libraries
Version: trunk
Hardware: PC
OS: Windows NT
Status: NEW
Severity: normal
Priority: P
Component: Backend: X86
Assignee: unassignedb...@nondot.org
Reporter: pengfei.w...@intel.com
CC: craig.top...@gmail.com, llvm-bugs@lists.llvm.org,
llvm-...@redking.me.uk, pengfei.w...@intel.com,
spatel+l...@rotateright.com
Small reproducer:
#include <array>
#include <vector>
#include <intrin.h>
struct A {
std::string S;
std::vector<std::array<int, 4>> V;
A() {
std::array<int, 4> B;
__cpuid(B.data(), 0);
V.push_back(B);
V.push_back(B);
char C[64];
memset(C, 0, sizeof(C));
S = C;
}
} T;
Commands:
clang-cl -mavx2 /EHs repro.cpp -S
cat repro.asm | grep cpuid -A7
cpuid
#NO_APP
mov r11d, eax
mov rax, qword ptr [rbx + 72] # 8-byte Reload
mov r10d, ebx
mov r9d, ecx
mov rcx, qword ptr [rbx + 80] # 8-byte Reload
mov r8d, edx
--
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