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| author | Richard Stallman <rms@gnu.org> | 1993-03-16 04:54:43 +0000 |
|---|---|---|
| committer | Richard Stallman <rms@gnu.org> | 1993-03-16 04:54:43 +0000 |
| commit | af2cc4dd6953054b4a1d068dc5bffeeb6170f37b (patch) | |
| tree | 5d2d22b5678cfbace95f222758b1c05f7e3226b8 | |
| parent | 1a6603daede2865e5ffc12f493df87ff834cc292 (diff) | |
| download | gcc-af2cc4dd6953054b4a1d068dc5bffeeb6170f37b.zip gcc-af2cc4dd6953054b4a1d068dc5bffeeb6170f37b.tar.gz gcc-af2cc4dd6953054b4a1d068dc5bffeeb6170f37b.tar.bz2 | |
(expand_binop): For doubleword int addition,
clobber the whole register at the start.
From-SVN: r3754
| -rw-r--r-- | gcc/optabs.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/gcc/optabs.c b/gcc/optabs.c index 5229f97..81b5f69 100644 --- a/gcc/optabs.c +++ b/gcc/optabs.c @@ -590,6 +590,10 @@ expand_binop (mode, binoptab, op0, op1, target, unsignedp, methods) || target == xop0 || target == xop1) target = gen_reg_rtx (mode); + /* Indicate for flow that the entire target reg is being set. */ + if (GET_CODE (target) == REG) + emit_insn (gen_rtx (CLOBBER, VOIDmode, target)); + /* Do the actual arithmetic. */ for (i = 0; i < nwords; i++) { |