diff options
Diffstat (limited to 'gcc/config/sh/sh.md')
| -rw-r--r-- | gcc/config/sh/sh.md | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/gcc/config/sh/sh.md b/gcc/config/sh/sh.md index 2c81792..9cc42b4 100644 --- a/gcc/config/sh/sh.md +++ b/gcc/config/sh/sh.md @@ -8502,6 +8502,20 @@ label: operands[2], gen_rtx_REG (Pmode, PIC_REG))); + /* When stack protector inserts codes after the result is set to + R0, @(rX, r12) will cause a spill failure for R0. Don't schedule + insns to avoid combining (set A (plus rX r12)) and (set op0 (mem A)) + when rX is a GOT address for the guard symbol. Ugly but doesn't + matter because this is a rare situation. */ + if (!TARGET_SHMEDIA + && flag_stack_protect + && GET_CODE (operands[1]) == CONST + && GET_CODE (XEXP (operands[1], 0)) == UNSPEC + && GET_CODE (XVECEXP (XEXP (operands[1], 0), 0, 0)) == SYMBOL_REF + && strcmp (XSTR (XVECEXP (XEXP (operands[1], 0), 0, 0), 0), + \"__stack_chk_guard\") == 0) + emit_insn (gen_blockage ()); + /* N.B. This is not constant for a GOTPLT relocation. */ mem = gen_rtx_MEM (Pmode, operands[3]); MEM_NOTRAP_P (mem) = 1; |