diff options
| author | Jim Wilson <wilson@gcc.gnu.org> | 1996-03-08 11:10:35 -0800 |
|---|---|---|
| committer | Jim Wilson <wilson@gcc.gnu.org> | 1996-03-08 11:10:35 -0800 |
| commit | 8b760293d7b65995bb5d80729777d927d839ad5e (patch) | |
| tree | 7c46eff3ffea522a7d7b04a4946e2409deb68157 /gcc/config | |
| parent | 449bf2aa18c7d9c86954c0c148b6b87c288721e7 (diff) | |
| download | gcc-8b760293d7b65995bb5d80729777d927d839ad5e.zip gcc-8b760293d7b65995bb5d80729777d927d839ad5e.tar.gz gcc-8b760293d7b65995bb5d80729777d927d839ad5e.tar.bz2 | |
(reg_unused_after): Return 0 if see a JUMP_INSN.
From-SVN: r11501
Diffstat (limited to 'gcc/config')
| -rw-r--r-- | gcc/config/sh/sh.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/gcc/config/sh/sh.c b/gcc/config/sh/sh.c index 144a5b0..cae782a 100644 --- a/gcc/config/sh/sh.c +++ b/gcc/config/sh/sh.c @@ -2338,7 +2338,7 @@ fp_one_operand (op) /* Return non-zero if REG is not used after INSN. We assume REG is a reload reg, and therefore does - not live past labels or calls or jumps. */ + not live past labels. It may live past calls or jumps though. */ int reg_unused_after (reg, insn) rtx reg; @@ -2369,11 +2369,14 @@ reg_unused_after (reg, insn) /* else */ #endif + if (code == JUMP_INSN) + return 0; + /* If this is a sequence, we must handle them all at once. We could have for instance a call that sets the target register, and a insn in a delay slot that uses the register. In this case, we must return 0. */ - if (code == INSN && GET_CODE (PATTERN (insn)) == SEQUENCE) + else if (code == INSN && GET_CODE (PATTERN (insn)) == SEQUENCE) { int i; int retval = 0; |