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| -rw-r--r-- | gcc/config/sh/sh.md | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/gcc/config/sh/sh.md b/gcc/config/sh/sh.md index 4a17971..fc80278 100644 --- a/gcc/config/sh/sh.md +++ b/gcc/config/sh/sh.md @@ -8395,9 +8395,15 @@ ;; Store (negated) T bit as all zeros or ones in a reg. ;; subc Rn,Rn ! Rn = Rn - Rn - T; T = T ;; not Rn,Rn ! Rn = 0 - Rn +;; +;; Note the call to sh_split_treg_set_expr may clobber +;; the T reg. We must express this, even though it's +;; not immediately obvious this pattern changes the +;; T register. (define_insn_and_split "mov_neg_si_t" [(set (match_operand:SI 0 "arith_reg_dest" "=r") - (neg:SI (match_operand 1 "treg_set_expr")))] + (neg:SI (match_operand 1 "treg_set_expr"))) + (clobber (reg:SI T_REG))] "TARGET_SH1" { gcc_assert (t_reg_operand (operands[1], VOIDmode)); |