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[PATCH] Fix PR optimization/11637 (x86)
- From: Eric Botcazou <ebotcazou at libertysurf dot fr>
- To: gcc-patches at gcc dot gnu dot org
- Date: Sat, 13 Sep 2003 10:36:19 +0200
- Subject: [PATCH] Fix PR optimization/11637 (x86)
Hi,
This is again a problem with -fnon-call-exceptions, a regression present on
the 3.3 branch (and latent on mainline).
The compiler emits
movl 5.0000000745058059692383e-2, (%eax)
in the assembly file, which is not quite a pure x86 idiom.
2003-09-13 Eric Botcazou <ebotcazou@libertysurf.fr>
PR optimization/11637
* config/i386/i386.md (movsf_1): Remove 'F' from alternative #4.
2003-09-13 Eric Botcazou <ebotcazou@libertysurf.fr>
* g++.dg/opt/float1.C: New test.
--
Eric BotcazouIndex: config/i386/i386.md
===================================================================
RCS file: /cvs/gcc/gcc/gcc/config/i386/i386.md,v
retrieving revision 1.404.2.19
diff -u -r1.404.2.19 i386.md
--- config/i386/i386.md 8 Jul 2003 19:16:42 -0000 1.404.2.19
+++ config/i386/i386.md 13 Sep 2003 08:12:01 -0000
@@ -2079,7 +2079,7 @@
(define_insn "*movsf_1"
[(set (match_operand:SF 0 "nonimmediate_operand" "=f#xr,m,f#xr,r#xf,m,x#rf,x#rf,x#rf,m,!*y,!rm,!*y")
- (match_operand:SF 1 "general_operand" "fm#rx,f#rx,G,rmF#fx,Fr#fx,C,x,xm#rf,x#rf,rm,*y,*y"))]
+ (match_operand:SF 1 "general_operand" "fm#rx,f#rx,G,rmF#fx,r#fx,C,x,xm#rf,x#rf,rm,*y,*y"))]
"(GET_CODE (operands[0]) != MEM || GET_CODE (operands[1]) != MEM)
&& (reload_in_progress || reload_completed
|| (ix86_cmodel == CM_MEDIUM || ix86_cmodel == CM_LARGE)
// PR optimization/11637
// Origin: <nick@ilm.com>
// This used to fail to assemble on x86 because of
// a broken constraint in the SF move insn.
// { dg-do compile }
// { dg-options "-O2 -fnon-call-exceptions" }
void f(long int seed);
void g(float &o)
{
float a = 0.05f;
float b = 1.0 - a;
float c = 1.0 + a;
f(0);
o = a;
}