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| author | Jakub Jelinek <jakub@redhat.com> | 2017-11-22 10:57:28 +0100 |
|---|---|---|
| committer | Jakub Jelinek <jakub@gcc.gnu.org> | 2017-11-22 10:57:28 +0100 |
| commit | a2998ed1dc4389e2d648ba376f1eca2c165a2717 (patch) | |
| tree | e74efc9fd718473642ee90a0a64c09bac23f4832 /gcc/optabs.c | |
| parent | 0a770b5907cdb70709356fbbfe5c570010b0b936 (diff) | |
re PR middle-end/82875 (ICE at -Os on valid code on x86_64-linux-gnu: in find_widening_optab_handler_and_mode, at optabs-query.c:414)
PR middle-end/82875
* optabs.c (expand_doubleword_mult, expand_binop): Before calling
expand_binop with *mul_widen_optab, make sure at least one of the
operands doesn't have VOIDmode.
* gcc.dg/pr82875.c: New test.
* gcc.c-torture/compile/pr82875.c: New test.
From-SVN: r255050
Diffstat (limited to 'gcc/optabs.c')
| -rw-r--r-- | gcc/optabs.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/gcc/optabs.c b/gcc/optabs.c index 847b801d288..518ce7a972c 100644 --- a/gcc/optabs.c +++ b/gcc/optabs.c @@ -861,6 +861,11 @@ expand_doubleword_mult (machine_mode mode, rtx op0, rtx op1, rtx target, if (target && !REG_P (target)) target = NULL_RTX; + /* *_widen_optab needs to determine operand mode, make sure at least + one operand has non-VOID mode. */ + if (GET_MODE (op0_low) == VOIDmode && GET_MODE (op1_low) == VOIDmode) + op0_low = force_reg (word_mode, op0_low); + if (umulp) product = expand_binop (mode, umul_widen_optab, op0_low, op1_low, target, 1, OPTAB_DIRECT); @@ -1199,6 +1204,10 @@ expand_binop (machine_mode mode, optab binoptab, rtx op0, rtx op1, : smul_widen_optab), wider_mode, mode) != CODE_FOR_nothing)) { + /* *_widen_optab needs to determine operand mode, make sure at least + one operand has non-VOID mode. */ + if (GET_MODE (op0) == VOIDmode && GET_MODE (op1) == VOIDmode) + op0 = force_reg (mode, op0); temp = expand_binop (wider_mode, unsignedp ? umul_widen_optab : smul_widen_optab, op0, op1, NULL_RTX, unsignedp, OPTAB_DIRECT); |