diff options
| author | Jan Hubicka <hubicka@freesoft.cz> | 1999-11-25 13:53:44 +0100 |
|---|---|---|
| committer | Jan Hubicka <hubicka@gcc.gnu.org> | 1999-11-25 12:53:44 +0000 |
| commit | caa6ec8dc54d2661eb3e7557a4f555867190d63b (patch) | |
| tree | a4bf9453290b36a89996ebbd090aa3032a51500f /gcc/reg-stack.c | |
| parent | 58dbe05f3a8d62d7c5e9982c9caf35ec4d403595 (diff) | |
| download | gcc-caa6ec8dc54d2661eb3e7557a4f555867190d63b.zip gcc-caa6ec8dc54d2661eb3e7557a4f555867190d63b.tar.gz gcc-caa6ec8dc54d2661eb3e7557a4f555867190d63b.tar.bz2 | |
reg-stack.c (subst_stack_regs_pat): Swap operands in commutative operations when needed.
* reg-stack.c (subst_stack_regs_pat): Swap operands in commutative
operations when needed.
* i386.md (fop_?f_comm): New.
(fop_?f_1): Do not accept commutative operands.
From-SVN: r30664
Diffstat (limited to 'gcc/reg-stack.c')
| -rw-r--r-- | gcc/reg-stack.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/gcc/reg-stack.c b/gcc/reg-stack.c index 98b8778..aa2b010 100644 --- a/gcc/reg-stack.c +++ b/gcc/reg-stack.c @@ -1631,6 +1631,16 @@ subst_stack_regs_pat (insn, regstack, pat) SET_HARD_REG_BIT (regstack->reg_set, REGNO (*dest)); replace_reg (dest, get_hard_regnum (regstack, *dest)); } + + /* Keep operand 1 maching with destination. */ + if (GET_RTX_CLASS (GET_CODE (pat_src)) == 'c' + && REG_P (*src1) && REG_P (*src2) + && REGNO (*src1) != REGNO (*dest)) + { + rtx tmp = *src1; + *src1 = *src2; + *src2 = tmp; + } break; case UNSPEC: |