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| author | Segher Boessenkool <segher@kernel.crashing.org> | 2016-11-30 09:41:26 +0100 |
|---|---|---|
| committer | Segher Boessenkool <segher@gcc.gnu.org> | 2016-11-30 09:41:26 +0100 |
| commit | 2df22b5f30b902dea76f131f78e08e530e7bf613 (patch) | |
| tree | 40dbe8d64eeb08dc20355fa838e021d7259f495e | |
| parent | 4a954e068579e326c53bd845a13fbd58ae5a1f80 (diff) | |
| download | gcc-2df22b5f30b902dea76f131f78e08e530e7bf613.zip gcc-2df22b5f30b902dea76f131f78e08e530e7bf613.tar.gz gcc-2df22b5f30b902dea76f131f78e08e530e7bf613.tar.bz2 | |
simplify-rtx: Add missing line for previous commit (PR78583)
The comment for the added case to simplify_truncation reads
/* Turn (truncate:M1 (*_extract:M2 (reg:M2) (len) (pos))) into
(*_extract:M1 (truncate:M1 (reg:M2)) (len) (pos')) if possible without
changing len. */
but I forgot to check the two modes M2 are actually the same.
PR rtl-optimization/78583
* simplify-rtx.c (simplify_truncation): Add check missing from the
previous commit.
From-SVN: r243000
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/simplify-rtx.c | 1 |
2 files changed, 7 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 1febcad..8f8e450 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,5 +1,11 @@ 2016-11-30 Segher Boessenkool <segher@kernel.crashing.org> + PR rtl-optimization/78583 + * simplify-rtx.c (simplify_truncation): Add check missing from the + previous commit. + +2016-11-30 Segher Boessenkool <segher@kernel.crashing.org> + PR rtl-optimization/78590 * combine.c (change_zero_ext): Transform zero_extend of subregs only if the subreg_reg is a scalar integer mode. diff --git a/gcc/simplify-rtx.c b/gcc/simplify-rtx.c index 7778db5..7ed849f 100644 --- a/gcc/simplify-rtx.c +++ b/gcc/simplify-rtx.c @@ -752,6 +752,7 @@ simplify_truncation (machine_mode mode, rtx op, changing len. */ if ((GET_CODE (op) == ZERO_EXTRACT || GET_CODE (op) == SIGN_EXTRACT) && REG_P (XEXP (op, 0)) + && GET_MODE (XEXP (op, 0)) == mode && CONST_INT_P (XEXP (op, 1)) && CONST_INT_P (XEXP (op, 2))) { |