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[2/6] arm: Fix the "c" constraint

Message ID 20191108105408.27584-3-richard.henderson@linaro.org
State Superseded
Headers show
Series Implement asm flag outputs for arm + aarch64 | expand

Commit Message

Richard Henderson Nov. 8, 2019, 10:54 a.m. UTC 
The existing definition using register class CC_REG does not
work because CC_REGNUM does not support normal modes, and so
fails to match register_operand.  Use a non-register constraint
and the cc_register predicate instead.

        * config/arm/constraints.md (c): Use cc_register predicate.
---
 gcc/config/arm/constraints.md | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

-- 
2.17.1
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Patch

diff --git a/gcc/config/arm/constraints.md b/gcc/config/arm/constraints.md
index b76de81b85c..e02b678d26d 100644
--- a/gcc/config/arm/constraints.md
+++ b/gcc/config/arm/constraints.md
@@ -94,8 +94,9 @@ 
  "@internal
   Thumb only.  The union of the low registers and the stack register.")
 
-(define_register_constraint "c" "CC_REG"
- "@internal The condition code register.")
+(define_constraint "c"
+ "@internal The condition code register."
+ (match_operand 0 "cc_register"))
 
 (define_register_constraint "Cs" "CALLER_SAVE_REGS"
  "@internal The caller save registers.  Useful for sibcalls.")