[gcc(refs/users/meissner/heads/work043)] Move denormal warning for XXSPLTID built-in function.

[gcc(refs/users/meissner/heads/work043)] Move denormal warning for XXSPLTID built-in function.

[Michael Meissner]

https://gcc.gnu.org/g:ba9996cf1f45653475d06344ec9ad26d71c4a36a

commit ba9996cf1f45653475d06344ec9ad26d71c4a36a
Author: Michael Meissner <meissner@linux.ibm.com>
Date:   Tue Mar 30 16:27:04 2021 -0400

    Move denormal warning for XXSPLTID built-in function.
    
    This patch moves the place where the warning is given if the user tries to
    use XXSPLTID to load up values that are denormal 32-bit values.  I felt
    that this warning was better in the built-in function expansion code
    than in the middle of RTL generation.
    
    gcc/
    2021-03-30  Michael Meissner  <meissner@linux.ibm.com>
    
            * config/rs6000/altivec.md (xxspltidp_v2df): Call the RTL
            generation function directly, instead of using a middle man
            function.
            * config/rs6000/rs6000-call.c (rs6000_expand_unop_builtin): Move
            warning hear about using the XXSPLTID instruction with a denormal
            immediate value.
            * config/rs6000/rs6000-protos.c (rs6000_emit_xxspltidp_v2df):
            Delete.
            * config/rs6000/rs6000.c (rs6000_emit_xxspltidp_v2df): Delete.

Diff:
---
 gcc/config/rs6000/altivec.md      |  2 +-
 gcc/config/rs6000/rs6000-call.c   |  9 +++++++++
 gcc/config/rs6000/rs6000-protos.h |  2 --
 gcc/config/rs6000/rs6000.c        | 10 ----------
 4 files changed, 10 insertions(+), 13 deletions(-)

diff --git a/gcc/config/rs6000/altivec.md b/gcc/config/rs6000/altivec.md
index 9e151f033c3..228d88210bf 100644
--- a/gcc/config/rs6000/altivec.md
+++ b/gcc/config/rs6000/altivec.md
@@ -881,7 +881,7 @@
  "TARGET_POWER10"
 {
   long value = rs6000_const_f32_to_i32 (operands[1]);
-  rs6000_emit_xxspltidp_v2df (operands[0], value);
+  emit_insn (gen_xxspltidp_v2df_inst (operands[0], GEN_INT (value)));
   DONE;
 })
 
diff --git a/gcc/config/rs6000/rs6000-call.c b/gcc/config/rs6000/rs6000-call.c
index f5676255387..c18b8209e36 100644
--- a/gcc/config/rs6000/rs6000-call.c
+++ b/gcc/config/rs6000/rs6000-call.c
@@ -9440,6 +9440,15 @@ rs6000_expand_unop_builtin (enum insn_code icode, tree exp, rtx target)
 	}
     }
 
+  /* The XXSPLTIDP instruction is undefined if the 32-bit float value is
+     denormal.  Warn the user that this might produce an undefined value at
+     runtime.  */
+  else if (icode == CODE_FOR_xxspltidp_v2df
+	   && !xxspltidp_operand (op0, mode0))
+    inform (input_location,
+	    "the result for the xxspltidp instruction is undefined for "
+	    "subnormal input values");
+
   if (target == 0
       || GET_MODE (target) != tmode
       || ! (*insn_data[icode].operand[0].predicate) (target, tmode))
diff --git a/gcc/config/rs6000/rs6000-protos.h b/gcc/config/rs6000/rs6000-protos.h
index 9fd38abe8d4..63d6c1c9c2c 100644
--- a/gcc/config/rs6000/rs6000-protos.h
+++ b/gcc/config/rs6000/rs6000-protos.h
@@ -319,6 +319,4 @@ extern bool rs6000_sum_of_two_registers_p (const_rtx expr);
 extern bool rs6000_quadword_masked_address_p (const_rtx exp);
 extern rtx rs6000_gen_lvx (enum machine_mode, rtx, rtx);
 extern rtx rs6000_gen_stvx (enum machine_mode, rtx, rtx);
-
-extern void rs6000_emit_xxspltidp_v2df (rtx, long value);
 #endif  /* rs6000-protos.h */
diff --git a/gcc/config/rs6000/rs6000.c b/gcc/config/rs6000/rs6000.c
index 6b004ff1f34..9d5fe4f2bd4 100644
--- a/gcc/config/rs6000/rs6000.c
+++ b/gcc/config/rs6000/rs6000.c
@@ -27852,16 +27852,6 @@ rs6000_const_f32_to_i32 (rtx operand)
   return value;
 }
 
-void
-rs6000_emit_xxspltidp_v2df (rtx dst, long value)
-{
-  if (((value & 0x7F800000) == 0) && ((value & 0x7FFFFF) != 0))
-    inform (input_location,
-	    "the result for the xxspltidp instruction "
-	    "is undefined for subnormal input values");
-  emit_insn( gen_xxspltidp_v2df_inst (dst, GEN_INT (value)));
-}
-
 /* Implement TARGET_ASM_GENERATE_PIC_ADDR_DIFF_VEC.  */
 
 static bool