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| author | ebotcazou <ebotcazou@138bc75d-0d04-0410-961f-82ee72b054a4> | 2004-03-04 09:01:03 +0000 |
|---|---|---|
| committer | ebotcazou <ebotcazou@138bc75d-0d04-0410-961f-82ee72b054a4> | 2004-03-04 09:01:03 +0000 |
| commit | d6af6bc2277b4be75e143a806add564c2b116b84 (patch) | |
| tree | 70ca7951bbb8dd5d3322110e353693674bfc1df8 /gcc/expr.c | |
| parent | 93d302144297d18f61298c3e92ab72436fc82322 (diff) | |
| download | gcc-d6af6bc2277b4be75e143a806add564c2b116b84.tar.gz | |
PR optimization/14235
* expr.c (convert_move): Copy the source to a new pseudo
when converting from a sub-word source to a larger-than-word
register which conflicts with the source.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@78893 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/expr.c')
| -rw-r--r-- | gcc/expr.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/gcc/expr.c b/gcc/expr.c index e2063c1950f..14809498a93 100644 --- a/gcc/expr.c +++ b/gcc/expr.c @@ -682,7 +682,11 @@ convert_move (rtx to, rtx from, int unsignedp) != CODE_FOR_nothing)) { if (GET_CODE (to) == REG) - emit_insn (gen_rtx_CLOBBER (VOIDmode, to)); + { + if (reg_overlap_mentioned_p (to, from)) + from = force_reg (from_mode, from); + emit_insn (gen_rtx_CLOBBER (VOIDmode, to)); + } convert_move (gen_lowpart (word_mode, to), from, unsignedp); emit_unop_insn (code, to, gen_lowpart (word_mode, to), equiv_code); |