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| author | Richard Henderson <rth@cygnus.com> | 1997-12-17 07:07:39 -0800 |
|---|---|---|
| committer | Richard Henderson <rth@gcc.gnu.org> | 1997-12-17 07:07:39 -0800 |
| commit | 8dcb529511c71f818cf107964ce568b521dcb025 (patch) | |
| tree | ae3bfd36f5ca10e9f56e941bddb7105b62c68737 | |
| parent | a99503b17d0f9fef4bfdb1fc4ff6a7786ce821d7 (diff) | |
| download | gcc-8dcb529511c71f818cf107964ce568b521dcb025.zip gcc-8dcb529511c71f818cf107964ce568b521dcb025.tar.gz gcc-8dcb529511c71f818cf107964ce568b521dcb025.tar.bz2 | |
sparc.md (jump): Don't use the annul bit around an empty loop.
* sparc.md (jump): Don't use the annul bit around an empty loop.
Patch from Kevin.Kelly@East.Sun.COM.
From-SVN: r17124
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/config/sparc/sparc.md | 16 |
2 files changed, 20 insertions, 1 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 1ffe005..a727929 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +Wed Dec 17 15:06:04 1997 Richard Henderson <rth@cygnus.com> + + * sparc.md (jump): Don't use the annul bit around an empty loop. + Patch from Kevin.Kelly@East.Sun.COM. + Wed Dec 17 00:51:36 1997 Stan Cox (scox@cygnus.com) * jump.c: (optimize_jump): Don't use the return register as a diff --git a/gcc/config/sparc/sparc.md b/gcc/config/sparc/sparc.md index 8ec12f5..8b235fb 100644 --- a/gcc/config/sparc/sparc.md +++ b/gcc/config/sparc/sparc.md @@ -5014,7 +5014,21 @@ (define_insn "jump" [(set (pc) (label_ref (match_operand 0 "" "")))] "" - "b%* %l0%(" + "* +{ + /* Some implementations are reported to have problems with + foo: b,a foo + i.e. an empty loop with the annul bit set. The workaround is to use + foo: b foo; nop + instead. */ + + if (flag_delayed_branch + && (insn_addresses[INSN_UID (operands[0])] + == insn_addresses[INSN_UID (insn)])) + return \"b %l0%#\"; + else + return \"b%* %l0%(\"; +}" [(set_attr "type" "uncond_branch")]) (define_expand "tablejump" |