x86: Properly handle USE_VECTOR_FP_CONVERTS/USE_VECTOR_CONVERTS

[thirdparty/gcc.git] / gcc / config / i386 / i386-features.c

diff --git a/gcc/config/i386/i386-features.c b/gcc/config/i386/i386-features.c
index 5a99ea7c0465f74163936762e719074531ab0171..a65f60122a5f1c28aef6acecf58db4dc24b5235b 100644 (file)
--- a/gcc/config/i386/i386-features.c
+++ b/gcc/config/i386/i386-features.c
@@ -2210,15 +2210,32 @@ remove_partial_avx_dependency (void)
              != AVX_PARTIAL_XMM_UPDATE_TRUE)
            continue;
 
-         if (!v4sf_const0)
-           v4sf_const0 = gen_reg_rtx (V4SFmode);
-
          /* Convert PARTIAL_XMM_UPDATE_TRUE insns, DF -> SF, SF -> DF,
             SI -> SF, SI -> DF, DI -> SF, DI -> DF, to vec_dup and
             vec_merge with subreg.  */
          rtx src = SET_SRC (set);
          rtx dest = SET_DEST (set);
          machine_mode dest_mode = GET_MODE (dest);
+         machine_mode src_mode = GET_MODE (XEXP (src, 0));
+
+         switch (src_mode)
+           {
+           case E_SFmode:
+           case E_DFmode:
+             if (TARGET_USE_VECTOR_FP_CONVERTS)
+               continue;
+             break;
+           case E_SImode:
+           case E_DImode:
+             if (TARGET_USE_VECTOR_CONVERTS)
+               continue;
+             break;
+           default:
+             break;
+           }
+
+         if (!v4sf_const0)
+           v4sf_const0 = gen_reg_rtx (V4SFmode);
 
          rtx zero;
          machine_mode dest_vecmode;