diff options
Diffstat (limited to 'gcc-4.9/gcc/rtlanal.c')
| -rw-r--r-- | gcc-4.9/gcc/rtlanal.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/gcc-4.9/gcc/rtlanal.c b/gcc-4.9/gcc/rtlanal.c index 98fbacce4..e99ef7bf7 100644 --- a/gcc-4.9/gcc/rtlanal.c +++ b/gcc-4.9/gcc/rtlanal.c @@ -873,6 +873,17 @@ reg_set_between_p (const_rtx reg, const_rtx from_insn, const_rtx to_insn) int reg_set_p (const_rtx reg, const_rtx insn) { + /* After delay slot handling, call and branch insns might be in a + sequence. Check all the elements there. */ + if (INSN_P (insn) && GET_CODE (PATTERN (insn)) == SEQUENCE) + { + for (int i = 0; i < XVECLEN (PATTERN (insn), 0); ++i) + if (reg_set_p (reg, XVECEXP (PATTERN (insn), 0, i))) + return true; + + return false; + } + /* We can be passed an insn or part of one. If we are passed an insn, check if a side-effect of the insn clobbers REG. */ if (INSN_P (insn) @@ -884,7 +895,7 @@ reg_set_p (const_rtx reg, const_rtx insn) GET_MODE (reg), REGNO (reg))) || MEM_P (reg) || find_reg_fusage (insn, CLOBBER, reg))))) - return 1; + return true; return set_of (reg, insn) != NULL_RTX; } |