diff options
Diffstat (limited to 'gcc/flow.c')
| -rw-r--r-- | gcc/flow.c | 9 |
1 files changed, 5 insertions, 4 deletions
@@ -1832,13 +1832,14 @@ propagate_one_insn (pbi, insn) if (GET_CODE (PATTERN (insn)) == COND_EXEC) cond = COND_EXEC_TEST (PATTERN (insn)); - /* Calls use their arguments. */ + /* Calls use their arguments, and may clobber memory which + address involves some register. */ for (note = CALL_INSN_FUNCTION_USAGE (insn); note; note = XEXP (note, 1)) - if (GET_CODE (XEXP (note, 0)) == USE) - mark_used_regs (pbi, XEXP (XEXP (note, 0), 0), - cond, insn); + /* We find USE or CLOBBER entities in a FUNCTION_USAGE list: both + of which mark_used_regs knows how to handle. */ + mark_used_regs (pbi, XEXP (XEXP (note, 0), 0), cond, insn); /* The stack ptr is used (honorarily) by a CALL insn. */ SET_REGNO_REG_SET (pbi->reg_live, STACK_POINTER_REGNUM); |