From: Maciej W. Rozycki <macro@embecosm.com>
Date: Wed, 22 Nov 2023 01:18:29 +0000 (+0000)
Subject: RISC-V: Also allow FP conditions in `riscv_expand_conditional_move'
X-Git-Tag: basepoints/gcc-15~4407
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=37ff43c27344784caed28778fb847244a49644bd;p=thirdparty%2Fgcc.git

RISC-V: Also allow FP conditions in `riscv_expand_conditional_move'

In `riscv_expand_conditional_move' we only let integer conditions
through at the moment, even though code has already been prepared to
handle floating-point conditions as well.

Lift this restriction and only bail out if a non-word-mode integer
condition has been requested, as we cannot handle this specific case
owing to machine instruction set restriction.  We already take care of
the non-integer, non-floating-point case later on.

	gcc/
	* config/riscv/riscv.cc (riscv_expand_conditional_move): Don't
	bail out in floating-point conditions.
---

diff --git a/gcc/config/riscv/riscv.cc b/gcc/config/riscv/riscv.cc
index 14e549392912..ef6569ed15ff 100644
--- a/gcc/config/riscv/riscv.cc
+++ b/gcc/config/riscv/riscv.cc
@@ -4138,12 +4138,12 @@ riscv_expand_conditional_move (rtx dest, rtx op, rtx cons, rtx alt)
       machine_mode mode0 = GET_MODE (op0);
       machine_mode mode1 = GET_MODE (op1);
 
-      /* The comparison must be comparing WORD_MODE objects.   We must
-	 enforce that so that we don't strip away a sign_extension
+      /* An integer comparison must be comparing WORD_MODE objects.  We
+	 must enforce that so that we don't strip away a sign_extension
 	 thinking it is unnecessary.  We might consider using
 	 riscv_extend_operands if they are not already properly extended.  */
-      if ((mode0 != word_mode && mode0 != VOIDmode)
-	  || (mode1 != word_mode && mode1 != VOIDmode))
+      if ((INTEGRAL_MODE_P (mode0) && mode0 != word_mode)
+	  || (INTEGRAL_MODE_P (mode1) && mode1 != word_mode))
 	return false;
 
       /* In the fallback generic case use MODE rather than WORD_MODE for