procyberian/gcc
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

i386: Fix V8HF vector init under -mno-avx [PR 104664]

Browse source 
For V8HFmode vector init with HFmode, do not directly emits V8HF move
with subreg, which may cause reload to assign general register to move
src.

gcc/ChangeLog:

	PR target/104664
	* config/i386/i386-expand.cc (ix86_expand_vector_init_duplicate):
	  Use vec_setv8hf_0 for HF to V8HFmode move instead of subreg.

gcc/testsuite/ChangeLog:

	PR target/104664
	* gcc.target/i386/pr104664.c: New test.
This commit is contained in:
Hongyu Wang 2022-02-28 15:09:59 +08:00
parent a35f16971b
commit e2385690a3
2 changed files with 22 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

7
gcc/config/i386/i386-expand.cc
View file

@ -14899,7 +14899,12 @@ ix86_expand_vector_init_duplicate (bool mmx_ok, machine_mode mode,
dperm.one_operand_p = true;
if (mode == V8HFmode)
tmp1 = lowpart_subreg (V8HFmode, force_reg (HFmode, val), HFmode);
{
tmp1 = force_reg (HFmode, val);
tmp2 = gen_reg_rtx (mode);
emit_insn (gen_vec_setv8hf_0 (tmp2, CONST0_RTX (mode), tmp1));
tmp1 = gen_lowpart (mode, tmp2);
}
else
{
/* Extend to SImode using a paradoxical SUBREG. */

16
gcc/testsuite/gcc.target/i386/pr104664.c Normal file
View file

@ -0,0 +1,16 @@
/* { dg-do compile { target { ! ia32 } } } */
/* { dg-options "-march=x86-64 -mtune=generic -Og -ffinite-math-only" } */
typedef _Float128 __attribute__((__vector_size__ (16))) U;
typedef _Float128 __attribute__((__vector_size__ (32))) V;
typedef _Float16 __attribute__((__vector_size__ (16))) W;
U u;
V v;
W w;
void
foo (void)
{
w *= (W)(u == __builtin_shufflevector (v, u, 2));
}