diff options
Diffstat (limited to 'gcc/combine.c')
| -rw-r--r-- | gcc/combine.c | 42 |
1 files changed, 23 insertions, 19 deletions
diff --git a/gcc/combine.c b/gcc/combine.c index 58366a6..cff76cd 100644 --- a/gcc/combine.c +++ b/gcc/combine.c @@ -4351,25 +4351,29 @@ try_combine (rtx_insn *i3, rtx_insn *i2, rtx_insn *i1, rtx_insn *i0, if (GET_CODE (x) == PARALLEL) x = XVECEXP (newi2pat, 0, 0); - /* It can only be a SET of a REG or of a SUBREG of a REG. */ - unsigned int regno = reg_or_subregno (SET_DEST (x)); - - bool done = false; - for (rtx_insn *insn = NEXT_INSN (i3); - !done - && insn - && NONDEBUG_INSN_P (insn) - && BLOCK_FOR_INSN (insn) == this_basic_block; - insn = NEXT_INSN (insn)) - { - struct insn_link *link; - FOR_EACH_LOG_LINK (link, insn) - if (link->insn == i3 && link->regno == regno) - { - link->insn = i2; - done = true; - break; - } + if (REG_P (SET_DEST (x)) + || (GET_CODE (SET_DEST (x)) == SUBREG + && REG_P (SUBREG_REG (SET_DEST (x))))) + { + unsigned int regno = reg_or_subregno (SET_DEST (x)); + + bool done = false; + for (rtx_insn *insn = NEXT_INSN (i3); + !done + && insn + && NONDEBUG_INSN_P (insn) + && BLOCK_FOR_INSN (insn) == this_basic_block; + insn = NEXT_INSN (insn)) + { + struct insn_link *link; + FOR_EACH_LOG_LINK (link, insn) + if (link->insn == i3 && link->regno == regno) + { + link->insn = i2; + done = true; + break; + } + } } } |