Movement between GENERAL_REGS and SSE_REGS for TImode doesn't need secondary reload.

Movement between GENERAL_REGS and SSE_REGS for TImode doesn't need secondary reload.

It results in 2 failures for x86_64-pc-linux-gnu{\
-march=cascadelake};

gcc: gcc.target/i386/extendditi3-1.c scan-assembler cqt?o
gcc: gcc.target/i386/pr113560.c scan-assembler-times \tmulq 1

For pr113560.c, now GCC generates mulx instead of mulq with
-march=cascadelake, which should be optimal, so adjust testcase for
that.
For gcc.target/i386/extendditi2-1.c, RA happens to choose another
register instead of rax and result in

	movq	%rdi, %rbp
	movq	%rdi, %rax
	sarq	$63, %rbp
	movq	%rbp, %rdx

The patch adds a new define_peephole2 for that.

gcc/ChangeLog:

	PR target/116274
	* config/i386/i386-expand.cc (ix86_expand_vector_move):
	Restrict special case TImode to 128-bit vector conversions via
	V2DI under ix86_pre_reload_split ().
	* config/i386/i386.cc (inline_secondary_memory_needed):
	Movement between GENERAL_REGS and SSE_REGS for TImode doesn't
	need secondary reload.
	* config/i386/i386.md (*extendsidi2_rex64): Add a
	define_peephole2 after it.

gcc/testsuite/ChangeLog:

	* gcc.target/i386/pr116274.c: New test.
	* gcc.target/i386/pr113560.c: Scan either mulq or mulx.