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| author | Michael Meissner <meissner@linux.vnet.ibm.com> | 2010-03-24 20:59:24 +0000 |
|---|---|---|
| committer | Michael Meissner <meissner@gcc.gnu.org> | 2010-03-24 20:59:24 +0000 |
| commit | 871c9abbb8b6adf07424fa0c2259edc2b709e906 (patch) | |
| tree | a1ae04d08272c835b924be59e975f29e0af0ce8a | |
| parent | 6d217c3249d527bb15f4e6153f39ce7e82b01778 (diff) | |
| download | gcc-871c9abbb8b6adf07424fa0c2259edc2b709e906.zip gcc-871c9abbb8b6adf07424fa0c2259edc2b709e906.tar.gz gcc-871c9abbb8b6adf07424fa0c2259edc2b709e906.tar.bz2 | |
Fix 43484, swap registers if one is R0 for multiword moves
From-SVN: r157709
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/config/rs6000/rs6000.c | 10 |
2 files changed, 16 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index e6d05fe..d2872bc 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2010-03-24 Michael Meissner <meissner@linux.vnet.ibm.com> + + PR target/43484 + * config/rs6000/rs6000.c (rs6000_split_multireg_move): If r0 is + used in reg+reg addressing, swap registers. + 2010-03-24 Jakub Jelinek <jakub@redhat.com> PR debug/43293 diff --git a/gcc/config/rs6000/rs6000.c b/gcc/config/rs6000/rs6000.c index ab48e82..98b4d94 100644 --- a/gcc/config/rs6000/rs6000.c +++ b/gcc/config/rs6000/rs6000.c @@ -16832,6 +16832,16 @@ rs6000_split_multireg_move (rtx dst, rtx src) { rtx basereg = XEXP (XEXP (dst, 0), 0); rtx offsetreg = XEXP (XEXP (dst, 0), 1); + gcc_assert (GET_CODE (XEXP (dst, 0)) == PLUS + && REG_P (basereg) + && REG_P (offsetreg) + && REGNO (basereg) != REGNO (offsetreg)); + if (REGNO (basereg) == 0) + { + rtx tmp = offsetreg; + offsetreg = basereg; + basereg = tmp; + } emit_insn (gen_add3_insn (basereg, basereg, offsetreg)); restore_basereg = gen_sub3_insn (basereg, basereg, offsetreg); dst = replace_equiv_address (dst, basereg); |