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| author | Richard Kenner <kenner@gcc.gnu.org> | 1992-07-31 08:11:54 -0400 |
|---|---|---|
| committer | Richard Kenner <kenner@gcc.gnu.org> | 1992-07-31 08:11:54 -0400 |
| commit | 510dd77e9569867570a74513c79eb767344370c6 (patch) | |
| tree | 22c8628cde5f7744c664c8ae0aa453e22e9eea81 /gcc/combine.c | |
| parent | 87b36970b70a7af4b76f5cd13c601e1319b8e4b9 (diff) | |
| download | gcc-510dd77e9569867570a74513c79eb767344370c6.zip gcc-510dd77e9569867570a74513c79eb767344370c6.tar.gz gcc-510dd77e9569867570a74513c79eb767344370c6.tar.bz2 | |
*** empty log message ***
From-SVN: r1730
Diffstat (limited to 'gcc/combine.c')
| -rw-r--r-- | gcc/combine.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/gcc/combine.c b/gcc/combine.c index b3865ed..ab9b09d 100644 --- a/gcc/combine.c +++ b/gcc/combine.c @@ -8095,6 +8095,18 @@ distribute_notes (notes, from_insn, i3, i2, elim_i2, elim_i1) if (XEXP (note, 0) == elim_i2 || XEXP (note, 0) == elim_i1) break; + /* If the register is used in both I2 and I3 and it dies in I3, + we might have added another reference to it. If reg_n_refs + was 2, bump it to 3. This has to be correct since the + register must have been set somewhere. The reason this is + done is because local-alloc.c treats 2 references as a + special case. */ + + if (place == i3 && i2 != 0 && GET_CODE (XEXP (note, 0)) == REG + && reg_n_refs[REGNO (XEXP (note, 0))]== 2 + && reg_referenced_p (XEXP (note, 0), PATTERN (i2))) + reg_n_refs[REGNO (XEXP (note, 0))] = 3; + if (place == 0) for (tem = prev_nonnote_insn (i3); tem && (GET_CODE (tem) == INSN |