diff options
Diffstat (limited to 'gcc/function.c')
| -rw-r--r-- | gcc/function.c | 30 |
1 files changed, 22 insertions, 8 deletions
diff --git a/gcc/function.c b/gcc/function.c index 5922712..86a87ab 100644 --- a/gcc/function.c +++ b/gcc/function.c @@ -2370,15 +2370,29 @@ fixup_var_refs_1 (var, promoted_mode, loc, insn, replacements, no_share) { rtx pat, last; - replacement = find_fixup_replacement (replacements, SET_SRC (x)); - if (replacement->new) - SET_SRC (x) = replacement->new; - else if (GET_CODE (SET_SRC (x)) == SUBREG) - SET_SRC (x) = replacement->new - = fixup_memory_subreg (SET_SRC (x), insn, 0); + if (GET_CODE (SET_SRC (x)) == SUBREG + && (GET_MODE_SIZE (GET_MODE (SET_SRC (x))) + > GET_MODE_SIZE (GET_MODE (var)))) + { + /* This (subreg VAR) is now a paradoxical subreg. We need + to replace VAR instead of the subreg. */ + replacement = find_fixup_replacement (replacements, var); + if (replacement->new == NULL_RTX) + replacement->new = gen_reg_rtx (GET_MODE (var)); + SUBREG_REG (SET_SRC (x)) = replacement->new; + } else - SET_SRC (x) = replacement->new - = fixup_stack_1 (SET_SRC (x), insn); + { + replacement = find_fixup_replacement (replacements, SET_SRC (x)); + if (replacement->new) + SET_SRC (x) = replacement->new; + else if (GET_CODE (SET_SRC (x)) == SUBREG) + SET_SRC (x) = replacement->new + = fixup_memory_subreg (SET_SRC (x), insn, 0); + else + SET_SRC (x) = replacement->new + = fixup_stack_1 (SET_SRC (x), insn); + } if (recog_memoized (insn) >= 0) return; |