https://sourceware.org/bugzilla/show_bug.cgi?id=33092
Bug ID: 33092
Summary: Internal error: assertion failure in build_modrm_byte
Product: binutils
Version: 2.40
Status: UNCONFIRMED
Severity: critical
Priority: P2
Component: gas
Assignee: unassigned at sourceware dot org
Reporter: qingren2hxb at gmail dot com
Target Milestone: ---
Input
==========
// test.c
#include <stdint.h>
int main()
{
uint64_t a = 0xa, b = 0xb, c = 0xc, d = 0xd;
__asm__(
"shldq %2, %1, %0\n\t"
"shldq %4, %3, %0\n\t"
: "+r"(a), "+r"(b)
: "r"(c), "r"(d)
: "cc");
return 0;
}
==========
Ouput
==========
gcc test.c
test.c: Assembler messages:
test.c:10: Internal error in build_modrm_byte at
../../gas/config/tc-i386.c:8290.
Please report this bug.
==========
GCC Version: 15.1.0
Gas Version: GNU assembler (GNU Binutils for Debian) 2.40
Hardware: x86_64
OS: Linux
This internal error originates from the following assertion check in
gas/config/tc-i386.c:8290
==========
gas_assert (i.imm_operands == 1
|| (i.imm_operands == 0
&& (i.tm.opcode_modifier.vexvvvv == VEXXDS
|| (i.types[0].bitfield.instance == RegC
&& i.types[0].bitfield.byte))));
==========
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