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| author | Jakub Jelinek <jakub@redhat.com> | 2017-11-25 20:35:47 +0100 |
|---|---|---|
| committer | Jakub Jelinek <jakub@gcc.gnu.org> | 2017-11-25 20:35:47 +0100 |
| commit | e95be6330d3621d46cc6acc3dd4c45da5fd3f4b6 (patch) | |
| tree | 837ff96e857d02a1e51428a14240c34fe0a2c869 /gcc/combine.c | |
| parent | 5a2707633bb664bd8a0f489dc9e311ab0a747d54 (diff) | |
| download | gcc-e95be6330d3621d46cc6acc3dd4c45da5fd3f4b6.zip gcc-e95be6330d3621d46cc6acc3dd4c45da5fd3f4b6.tar.gz gcc-e95be6330d3621d46cc6acc3dd4c45da5fd3f4b6.tar.bz2 | |
re PR rtl-optimization/81553 (ICE in immed_wide_int_const, at emit-rtl.c:607)
PR rtl-optimization/81553
* combine.c (simplify_if_then_else): In (if_then_else COND (OP Z C1) Z)
to (OP Z (mult COND (C1 * STORE_FLAG_VALUE))) optimization, if OP
is a shift where C1 has different mode than the whole shift, use C1's
mode for MULT rather than the shift's mode.
* gcc.c-torture/compile/pr81553.c: New test.
From-SVN: r255150
Diffstat (limited to 'gcc/combine.c')
| -rw-r--r-- | gcc/combine.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/gcc/combine.c b/gcc/combine.c index ab51543..0ce0751 100644 --- a/gcc/combine.c +++ b/gcc/combine.c @@ -6639,11 +6639,15 @@ simplify_if_then_else (rtx x) if (z) { - temp = subst (simplify_gen_relational (true_code, m, VOIDmode, + machine_mode cm = m; + if ((op == ASHIFT || op == LSHIFTRT || op == ASHIFTRT) + && GET_MODE (c1) != VOIDmode) + cm = GET_MODE (c1); + temp = subst (simplify_gen_relational (true_code, cm, VOIDmode, cond_op0, cond_op1), pc_rtx, pc_rtx, 0, 0, 0); - temp = simplify_gen_binary (MULT, m, temp, - simplify_gen_binary (MULT, m, c1, + temp = simplify_gen_binary (MULT, cm, temp, + simplify_gen_binary (MULT, cm, c1, const_true_rtx)); temp = subst (temp, pc_rtx, pc_rtx, 0, 0, 0); temp = simplify_gen_binary (op, m, gen_lowpart (m, z), temp); |