diff options
| author | Robin Dapp <rdapp@linux.ibm.com> | 2022-02-17 19:59:51 +0100 |
|---|---|---|
| committer | Robin Dapp <rdapp@linux.ibm.com> | 2022-02-17 19:59:51 +0100 |
| commit | fac15bf84807a58f83c741b1034c1bc96348319d (patch) | |
| tree | e3311a0966d4562eaa82a4a81ba7d2d918c7e7c0 | |
| parent | 73a118c209fcbb73c3439ca70fb233a5dc87daf7 (diff) | |
| download | gcc-fac15bf84807a58f83c741b1034c1bc96348319d.zip gcc-fac15bf84807a58f83c741b1034c1bc96348319d.tar.gz gcc-fac15bf84807a58f83c741b1034c1bc96348319d.tar.bz2 | |
rs6000: Workaround for new ifcvt behavior [PR104335].
Since r12-6747-gaa8cfe785953a0 ifcvt passes a "cc comparison"
i.e. the representation of the result of a comparison to the
backend. rs6000_emit_int_cmove () is not prepared to handle this.
Therefore, this patch makes it return false in such a case.
PR target/104335
gcc/ChangeLog:
* config/rs6000/rs6000.cc (rs6000_emit_int_cmove): Return false
if the expected comparison's first operand is of mode MODE_CC.
| -rw-r--r-- | gcc/config/rs6000/rs6000.cc | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/gcc/config/rs6000/rs6000.cc b/gcc/config/rs6000/rs6000.cc index e76c017..32a13cd 100644 --- a/gcc/config/rs6000/rs6000.cc +++ b/gcc/config/rs6000/rs6000.cc @@ -16215,6 +16215,12 @@ rs6000_emit_int_cmove (rtx dest, rtx op, rtx true_cond, rtx false_cond) if (mode != SImode && (!TARGET_POWERPC64 || mode != DImode)) return false; + /* PR104335: We now need to expect CC-mode "comparisons" + coming from ifcvt. The following code expects proper + comparisons so better abort here. */ + if (GET_MODE_CLASS (GET_MODE (XEXP (op, 0))) == MODE_CC) + return false; + /* We still have to do the compare, because isel doesn't do a compare, it just looks at the CRx bits set by a previous compare instruction. */ |