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| author | Jakub Jelinek <jakub@redhat.com> | 2015-03-10 07:36:50 +0100 |
|---|---|---|
| committer | Jakub Jelinek <jakub@gcc.gnu.org> | 2015-03-10 07:36:50 +0100 |
| commit | 26d83bccd1ed42a08b5940ba73742537b81efa2b (patch) | |
| tree | 1f964f2790839401b1c39db959a82bdc5757d7c1 /gcc/var-tracking.c | |
| parent | caf2df93de6eda7d35f78e31517a13a3676b1f5c (diff) | |
| download | gcc-26d83bccd1ed42a08b5940ba73742537b81efa2b.zip gcc-26d83bccd1ed42a08b5940ba73742537b81efa2b.tar.gz gcc-26d83bccd1ed42a08b5940ba73742537b81efa2b.tar.bz2 | |
re PR rtl-optimization/65321 (ICE on valid code at -O2 and -O3 with -g enabled in decompose, at rtl.h:2007)
PR rtl-optimization/65321
* cfgexpand.c (expand_debug_expr): Ensure shift amount isn't wider
than shift mode.
* var-tracking.c (use_narrower_mode): Likewise.
* gcc.dg/pr65321.c: New test.
From-SVN: r221298
Diffstat (limited to 'gcc/var-tracking.c')
| -rw-r--r-- | gcc/var-tracking.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/gcc/var-tracking.c b/gcc/var-tracking.c index 9ec5d8b..da4c61e 100644 --- a/gcc/var-tracking.c +++ b/gcc/var-tracking.c @@ -1011,7 +1011,13 @@ use_narrower_mode (rtx x, machine_mode mode, machine_mode wmode) return simplify_gen_binary (GET_CODE (x), mode, op0, op1); case ASHIFT: op0 = use_narrower_mode (XEXP (x, 0), mode, wmode); - return simplify_gen_binary (ASHIFT, mode, op0, XEXP (x, 1)); + op1 = XEXP (x, 1); + /* Ensure shift amount is not wider than mode. */ + if (GET_MODE (op1) == VOIDmode) + op1 = lowpart_subreg (mode, op1, wmode); + else if (GET_MODE_PRECISION (mode) < GET_MODE_PRECISION (GET_MODE (op1))) + op1 = lowpart_subreg (mode, op1, GET_MODE (op1)); + return simplify_gen_binary (ASHIFT, mode, op0, op1); default: gcc_unreachable (); } |