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(arm_gen_constant, case IOR,XOR): Don't invert a constant if loading

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it into a temporary.

From-SVN: r13290
This commit is contained in:
Richard Earnshaw 1996-12-12 10:53:05 +00:00
parent 89418a9257
commit 7b64da89ba
1 changed files with 3 additions and 4 deletions
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7
gcc/config/arm/arm.c
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@ -701,8 +701,8 @@ arm_gen_constant (code, mode, val, target, source, subtargets, generate)
case IOR:
case XOR:
/* If we have IOR or XOR, and the inverse of the constant can be loaded
in a single instruction, and we can find a temporary to put it in,
/* If we have IOR or XOR, and the constant can be loaded in a
single instruction, and we can find a temporary to put it in,
then this can be done in two instructions instead of 3-4. */
if (subtargets
|| (reload_completed && ! reg_mentioned_p (target, source)))
@ -713,8 +713,7 @@ arm_gen_constant (code, mode, val, target, source, subtargets, generate)
{
rtx sub = subtargets ? gen_reg_rtx (mode) : target;
emit_insn (gen_rtx (SET, VOIDmode, sub,
GEN_INT (ARM_SIGN_EXTEND (~ val))));
emit_insn (gen_rtx (SET, VOIDmode, sub, GEN_INT (val)));
emit_insn (gen_rtx (SET, VOIDmode, target,
gen_rtx (code, mode, source, sub)));
}