i386: avoid zero extension for crc32q

The crc32q instruction takes 64-bit operands, but ignores high 32 bits
of the destination operand, and zero-extends the result from 32 bits.

Let's model this in the RTL pattern to avoid zero-extension when the
_mm_crc32_u64 intrinsic is used with a 32-bit type.

	PR target/106453

gcc/ChangeLog:

	* config/i386/i386.md (sse4_2_crc32di): Model that only low 32
	bits of operand 0 are consumed, and the result is zero-extended
	to 64 bits.

gcc/testsuite/ChangeLog:

	* gcc.target/i386/pr106453.c: New test.

0 files changed, 0 insertions, 0 deletions