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(emit_push_insn): Clobber register only if it is non-zero.

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From-SVN: r11658
This commit is contained in:
Jim Wilson 1996-04-03 14:30:07 -08:00
parent d7083c81f6
commit 22745c7e7a
1 changed files with 1 additions and 1 deletions
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gcc/expr.c
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@ -2353,7 +2353,7 @@ emit_push_insn (x, mode, type, size, align, partial, reg, extra,
/* If we're placing part of X into a register and part of X onto /* If we're placing part of X into a register and part of X onto
the stack, indicate that the entire register is clobbered to the stack, indicate that the entire register is clobbered to
keep flow from thinking the unused part of the register is live. */ keep flow from thinking the unused part of the register is live. */
if (partial) if (partial > 0 && reg != 0)
emit_insn (gen_rtx (CLOBBER, VOIDmode, reg)); emit_insn (gen_rtx (CLOBBER, VOIDmode, reg));
/* Invert direction if stack is post-update. */ /* Invert direction if stack is post-update. */