diff options
Diffstat (limited to 'gcc/postreload-gcse.c')
| -rw-r--r-- | gcc/postreload-gcse.c | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/gcc/postreload-gcse.c b/gcc/postreload-gcse.c index 191d796..4fc66ec 100644 --- a/gcc/postreload-gcse.c +++ b/gcc/postreload-gcse.c @@ -671,10 +671,18 @@ record_last_set_info (rtx dest, rtx setter ATTRIBUTE_UNUSED, void *data) if (REG_P (dest)) record_last_reg_set_info (last_set_insn, REGNO (dest)); - else if (MEM_P (dest) - /* Ignore pushes, they clobber nothing. */ - && ! push_operand (dest, GET_MODE (dest))) - record_last_mem_set_info (last_set_insn); + else if (MEM_P (dest)) + { + /* Ignore pushes, they don't clobber memory. They may still + clobber the stack pointer though. Some targets do argument + pushes without adding REG_INC notes. See e.g. PR25196, + where a pushsi2 on i386 doesn't have REG_INC notes. Note + such changes here too. */ + if (! push_operand (dest, GET_MODE (dest))) + record_last_mem_set_info (last_set_insn); + else + record_last_reg_set_info (last_set_insn, STACK_POINTER_REGNUM); + } } |