diff options
Diffstat (limited to 'gcc/regrename.c')
| -rw-r--r-- | gcc/regrename.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/gcc/regrename.c b/gcc/regrename.c index 91e9d71a9a1..3a596ff35df 100644 --- a/gcc/regrename.c +++ b/gcc/regrename.c @@ -1225,7 +1225,9 @@ copy_value (rtx dest, rtx src, struct value_data *vd) if (frame_pointer_needed && dr == HARD_FRAME_POINTER_REGNUM) return; - /* Likewise for fixed or global registers. */ + /* Do not propagate copies to fixed or global registers, patterns + can be relying to see particular fixed register or users can + expect the chosen global register in asm. */ if (fixed_regs[dr] || global_regs[dr]) return; |
