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| author | Jeff Law <law@redhat.com> | 2020-03-25 14:33:08 -0600 |
|---|---|---|
| committer | Jeff Law <law@redhat.com> | 2020-03-25 14:33:08 -0600 |
| commit | 48817fbd7616f086ac7bb1dd38b862f78762c9b8 (patch) | |
| tree | 4fd94bd2eccb10ceebfff48a606f4b3931140d1c /gcc | |
| parent | eeb0c7c07133634eb5e98ba0348392684a763c95 (diff) | |
| download | gcc-48817fbd7616f086ac7bb1dd38b862f78762c9b8.zip gcc-48817fbd7616f086ac7bb1dd38b862f78762c9b8.tar.gz gcc-48817fbd7616f086ac7bb1dd38b862f78762c9b8.tar.bz2 | |
Fix vector-compare-1 regressions on sh4/sh4eb caused by pattern clobbering T reg without expressing that in its RTL.
PR rtl-optimization/90275
* config/sh/sh.md (mov_neg_si_t): Clobber the T register in the
pattern.
Diffstat (limited to 'gcc')
| -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)); |