Some tidy up for RA related hooks.

1. We also need to guard size of TO to be
less than TARGET_SSE2 ? 2 : 4 in ix86_can_change_mode_class.
2. Merge VALID_AVX512FP16_SCALAR_MODE plus BFmode
into VALID_AVX512F_SCALAR_MODE since we've support 16-bit data move
above SSE2, so no need for the condition of AVX512FP16 for those evex
sse registers.
3. Allocate DI/HImode to sse register for SSE2 above just like
SImode since we've supported 16-bit data move between sse and gpr
above SSE2, this will help RA to handle cases like (subreg:HI (reg:V8HI)
0) or else RA will spill it. This enable optimization for
pices-memset-{3,37,39}.c

gcc/ChangeLog:

	* config/i386/i386.cc (ix86_can_change_mode_class): Also guard
	size of TO.
	(ix86_hard_regno_mode_ok): Remove VALID_AVX512FP16_SCALAR_MODE
	* config/i386/i386.h (VALID_AVX512FP16_SCALAR_MODE): Merged to
	..
	(VALID_AVX512F_SCALAR_MODE): .. this, also add HImode.
	(VALID_SSE_REG_MODE): Add DI/HImode.

gcc/testsuite/ChangeLog:

	* gcc.target/i386/pieces-memset-3.c: Remove xfail.
	* gcc.target/i386/pieces-memset-37.c: Remove xfail.
	* gcc.target/i386/pieces-memset-39.c: Remove xfail.

5 files changed, 17 insertions, 18 deletions

diff --git a/gcc/config/i386/i386.cc b/gcc/config/i386/i386.cc
index 292b32c..14719d3 100644
--- a/gcc/config/i386/i386.cc
+++ b/gcc/config/i386/i386.cc
@@ -19725,7 +19725,8 @@ ix86_can_change_mode_class (machine_mode from, machine_mode to,
 	 the vec_dupv4hi pattern.
 	 NB: SSE2 can load 16bit data to sse register via pinsrw.  */
       int mov_size = MAYBE_SSE_CLASS_P (regclass) && TARGET_SSE2 ? 2 : 4;
-      if (GET_MODE_SIZE (from) < mov_size)
+      if (GET_MODE_SIZE (from) < mov_size
+	  || GET_MODE_SIZE (to) < mov_size)
 	return false;
     }
 
@@ -20089,12 +20090,6 @@ ix86_hard_regno_mode_ok (unsigned int regno, machine_mode mode)
 	      || VALID_AVX512F_SCALAR_MODE (mode)))
 	return true;
 
-      /* For AVX512FP16, vmovw supports movement of HImode
-	 and HFmode between GPR and SSE registers.  */
-      if (TARGET_AVX512FP16
-	  && VALID_AVX512FP16_SCALAR_MODE (mode))
-	return true;
-
       /* For AVX-5124FMAPS or AVX-5124VNNIW
 	 allow V64SF and V64SI modes for special regnos.  */
       if ((TARGET_AVX5124FMAPS || TARGET_AVX5124VNNIW)
@@ -20113,6 +20108,10 @@ ix86_hard_regno_mode_ok (unsigned int regno, machine_mode mode)
       if (EXT_REX_SSE_REGNO_P (regno))
 	return false;
 
+      /* Use pinsrw/pextrw to mov 16-bit data from/to sse to/from integer.  */
+      if (TARGET_SSE2 && mode == HImode)
+	return true;
+
       /* OImode and AVX modes are available only when AVX is enabled.  */
       return ((TARGET_AVX
 	       && VALID_AVX256_REG_OR_OI_MODE (mode))
diff --git a/gcc/config/i386/i386.h b/gcc/config/i386/i386.h
index 3869db8..d865fcb 100644
--- a/gcc/config/i386/i386.h
+++ b/gcc/config/i386/i386.h
@@ -1017,11 +1017,9 @@ extern const char *host_detect_local_cpu (int argc, const char **argv);
   (VALID_AVX256_REG_MODE (MODE) || (MODE) == OImode)
 
 #define VALID_AVX512F_SCALAR_MODE(MODE)					\
-  ((MODE) == DImode || (MODE) == DFmode || (MODE) == SImode		\
-   || (MODE) == SFmode)
-
-#define VALID_AVX512FP16_SCALAR_MODE(MODE)	\
-  ((MODE) == HImode || (MODE) == HFmode)
+  ((MODE) == DImode || (MODE) == DFmode					\
+   || (MODE) == SImode || (MODE) == SFmode				\
+   || (MODE) == HImode || (MODE) == HFmode || (MODE) == BFmode)
 
 #define VALID_AVX512F_REG_MODE(MODE)					\
   ((MODE) == V8DImode || (MODE) == V8DFmode || (MODE) == V64QImode	\
@@ -1045,13 +1043,15 @@ extern const char *host_detect_local_cpu (int argc, const char **argv);
    || (MODE) == V8HFmode || (MODE) == V4HFmode || (MODE) == V2HFmode	\
    || (MODE) == V8BFmode || (MODE) == V4BFmode || (MODE) == V2BFmode	\
    || (MODE) == V4QImode || (MODE) == V2HImode || (MODE) == V1SImode	\
-   || (MODE) == V2DImode || (MODE) == V2QImode || (MODE) == DFmode	\
+   || (MODE) == V2DImode || (MODE) == V2QImode				\
+   || (MODE) == DFmode	|| (MODE) == DImode				\
    || (MODE) == HFmode || (MODE) == BFmode)
 
 #define VALID_SSE_REG_MODE(MODE)					\
   ((MODE) == V1TImode || (MODE) == TImode				\
    || (MODE) == V4SFmode || (MODE) == V4SImode				\
-   || (MODE) == SFmode || (MODE) == TFmode || (MODE) == TDmode)
+   || (MODE) == SFmode || (MODE) == SImode				\
+   || (MODE) == TFmode || (MODE) == TDmode)
 
 #define VALID_MMX_REG_MODE_3DNOW(MODE) \
   ((MODE) == V2SFmode || (MODE) == SFmode)
diff --git a/gcc/testsuite/gcc.target/i386/pieces-memset-3.c b/gcc/testsuite/gcc.target/i386/pieces-memset-3.c
index 765441a..431732a 100644
--- a/gcc/testsuite/gcc.target/i386/pieces-memset-3.c
+++ b/gcc/testsuite/gcc.target/i386/pieces-memset-3.c
@@ -13,6 +13,6 @@ foo (int x)
 /* { dg-final { scan-assembler-times "vinserti64x4\[ \\t\]+\[^\n\]*%zmm" 1 } } */
 /* { dg-final { scan-assembler-times "vmovdqu64\[ \\t\]+\[^\n\]*%zmm" 1 } } */
 /* No need to dynamically realign the stack here.  */
-/* { dg-final { scan-assembler-not "and\[^\n\r]*%\[re\]sp" { xfail *-*-* } } } */
+/* { dg-final { scan-assembler-not "and\[^\n\r]*%\[re\]sp" } } */
 /* Nor use a frame pointer.  */
-/* { dg-final { scan-assembler-not "%\[re\]bp" { xfail *-*-* } } } */
+/* { dg-final { scan-assembler-not "%\[re\]bp" { xfail ia32 } } } */
diff --git a/gcc/testsuite/gcc.target/i386/pieces-memset-37.c b/gcc/testsuite/gcc.target/i386/pieces-memset-37.c
index 0c5056b..5cc4d77 100644
--- a/gcc/testsuite/gcc.target/i386/pieces-memset-37.c
+++ b/gcc/testsuite/gcc.target/i386/pieces-memset-37.c
@@ -10,6 +10,6 @@ foo (int a1, int a2, int a3, int a4, int a5, int a6, int x, char *dst)
 /* { dg-final { scan-assembler-times "vpbroadcastb\[ \\t\]+\[^\n\]*%ymm" 1 } } */
 /* { dg-final { scan-assembler-times "vmovdqu\[ \\t\]+\[^\n\]*%ymm" 2 } } */
 /* No need to dynamically realign the stack here.  */
-/* { dg-final { scan-assembler-not "and\[^\n\r]*%\[re\]sp" { xfail *-*-* } } } */
+/* { dg-final { scan-assembler-not "and\[^\n\r]*%\[re\]sp" } } */
 /* Nor use a frame pointer.  */
 /* { dg-final { scan-assembler-not "%\[re\]bp" { xfail *-*-* } } } */
diff --git a/gcc/testsuite/gcc.target/i386/pieces-memset-39.c b/gcc/testsuite/gcc.target/i386/pieces-memset-39.c
index e33644c..8627127 100644
--- a/gcc/testsuite/gcc.target/i386/pieces-memset-39.c
+++ b/gcc/testsuite/gcc.target/i386/pieces-memset-39.c
@@ -11,6 +11,6 @@ foo (int a1, int a2, int a3, int a4, int a5, int a6, int x, char *dst)
 /* { dg-final { scan-assembler-not "vinserti64x4" } } */
 /* { dg-final { scan-assembler-times "vmovdqu8\[ \\t\]+\[^\n\]*%zmm" 1 } } */
 /* No need to dynamically realign the stack here.  */
-/* { dg-final { scan-assembler-not "and\[^\n\r]*%\[re\]sp" { xfail *-*-* } } } */
+/* { dg-final { scan-assembler-not "and\[^\n\r]*%\[re\]sp" } } */
 /* Nor use a frame pointer.  */
 /* { dg-final { scan-assembler-not "%\[re\]bp" { xfail *-*-* } } } */