Hi,
As Segher pointed out in PR92566, we shouldn't offer some vector modes which
aren't supported under current setting. This patch is to make it check by
VECTOR_UNIT_NONE_P which is initialized as current architecture masks.
Bootstrapped and tested on powerpc64le-linux-gnu.
Is it ok for trunk?
BR,
Kewen
gcc/ChangeLog
2019-11-27 Kewen Lin
PR tree-optimization/91790
* gcc/config/rs6000/rs6000.c (rs6000_preferred_simd_mode): Check by
VECTOR_UNIT_NONE_P instead.
diff --git a/gcc/config/rs6000/rs6000.c b/gcc/config/rs6000/rs6000.c
index 5876714..40529e6 100644
--- a/gcc/config/rs6000/rs6000.c
+++ b/gcc/config/rs6000/rs6000.c
@@ -4906,30 +4906,11 @@ rs6000_builtin_vectorization_cost (enum
vect_cost_for_stmt type_of_cost,
static machine_mode
rs6000_preferred_simd_mode (scalar_mode mode)
{
- if (TARGET_VSX)
-switch (mode)
- {
- case E_DFmode:
- return V2DFmode;
- default:;
- }
- if (TARGET_ALTIVEC || TARGET_VSX)
-switch (mode)
- {
- case E_SFmode:
- return V4SFmode;
- case E_TImode:
- return V1TImode;
- case E_DImode:
- return V2DImode;
- case E_SImode:
- return V4SImode;
- case E_HImode:
- return V8HImode;
- case E_QImode:
- return V16QImode;
- default:;
- }
+ opt_machine_mode vmode = mode_for_vector (mode, 16 / GET_MODE_SIZE (mode));
+
+ if (vmode.exists () && !VECTOR_UNIT_NONE_P (vmode.require ()))
+return vmode.require ();
+
return word_mode;
}
