diff options
Diffstat (limited to 'gcc/combine.c')
| -rw-r--r-- | gcc/combine.c | 22 |
1 files changed, 21 insertions, 1 deletions
diff --git a/gcc/combine.c b/gcc/combine.c index 892c834..03e9a78 100644 --- a/gcc/combine.c +++ b/gcc/combine.c @@ -11567,7 +11567,27 @@ recog_for_combine (rtx *pnewpat, rtx_insn *insn, rtx *pnotes) bool changed = false; if (GET_CODE (pat) == SET) - changed = change_zero_ext (pat); + { + /* For an unrecognized single set of a constant, try placing it in + the constant pool, if this function already uses one. */ + rtx src = SET_SRC (pat); + if (CONSTANT_P (src) + && !CONST_INT_P (src) + && crtl->uses_const_pool) + { + machine_mode mode = GET_MODE (src); + if (mode == VOIDmode) + mode = GET_MODE (SET_DEST (pat)); + src = force_const_mem (mode, src); + if (src) + { + SUBST (SET_SRC (pat), src); + changed = true; + } + } + else + changed = change_zero_ext (pat); + } else if (GET_CODE (pat) == PARALLEL) { int i; |