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| author | obrien <obrien@FreeBSD.org> | 2002-12-04 15:42:16 +0000 |
|---|---|---|
| committer | obrien <obrien@FreeBSD.org> | 2002-12-04 15:42:16 +0000 |
| commit | 7a1080fa5c329ea8a9505e51ce151719955bcfa2 (patch) | |
| tree | 78b77287e56e2a87be73638176124be85a8fc6c7 /contrib/gcc/loop.c | |
| parent | ef3bb1318428b8cfb1c8287f61b9b1f23f9bf0b5 (diff) | |
| download | FreeBSD-src-7a1080fa5c329ea8a9505e51ce151719955bcfa2.zip FreeBSD-src-7a1080fa5c329ea8a9505e51ce151719955bcfa2.tar.gz | |
Gcc 3.2.1 release virgin vendor import. (19-Nov-2002)
Diffstat (limited to 'contrib/gcc/loop.c')
| -rw-r--r-- | contrib/gcc/loop.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/contrib/gcc/loop.c b/contrib/gcc/loop.c index 732a84d..149e7d1 100644 --- a/contrib/gcc/loop.c +++ b/contrib/gcc/loop.c @@ -9560,6 +9560,25 @@ loop_regs_scan (loop, extra_size) if (GET_CODE (insn) == CODE_LABEL || GET_CODE (insn) == JUMP_INSN) memset (last_set, 0, regs->num * sizeof (rtx)); + + /* Invalidate all registers used for function argument passing. + We check rtx_varies_p for the same reason as below, to allow + optimizing PIC calculations. */ + if (GET_CODE (insn) == CALL_INSN) + { + rtx link; + for (link = CALL_INSN_FUNCTION_USAGE (insn); + link; + link = XEXP (link, 1)) + { + rtx op, reg; + + if (GET_CODE (op = XEXP (link, 0)) == USE + && GET_CODE (reg = XEXP (op, 0)) == REG + && rtx_varies_p (reg, 1)) + regs->array[REGNO (reg)].may_not_optimize = 1; + } + } } /* Invalidate all hard registers clobbered by calls. With one exception: |
