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| author | Alan Modra <amodra@gmail.com> | 2015-01-17 11:11:52 +1030 |
|---|---|---|
| committer | Alan Modra <amodra@gcc.gnu.org> | 2015-01-17 11:11:52 +1030 |
| commit | 25d1a5a74d172683fac3e62816ff0aef8ad3b379 (patch) | |
| tree | 907e3b5f119b8c42e572927a2f304f0bebd603e6 /gcc/cprop.c | |
| parent | 3ecec1eff783311415180f8d53cbbf782698960f (diff) | |
| download | gcc-25d1a5a74d172683fac3e62816ff0aef8ad3b379.zip gcc-25d1a5a74d172683fac3e62816ff0aef8ad3b379.tar.gz gcc-25d1a5a74d172683fac3e62816ff0aef8ad3b379.tar.bz2 | |
cprop.c (do_local_cprop): Disallow replacement of fixed hard registers.
* cprop.c (do_local_cprop): Disallow replacement of fixed
hard registers.
From-SVN: r219786
Diffstat (limited to 'gcc/cprop.c')
| -rw-r--r-- | gcc/cprop.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/gcc/cprop.c b/gcc/cprop.c index c9fb2fc..e8182db 100644 --- a/gcc/cprop.c +++ b/gcc/cprop.c @@ -1189,10 +1189,12 @@ do_local_cprop (rtx x, rtx_insn *insn) rtx newreg = NULL, newcnst = NULL; /* Rule out USE instructions and ASM statements as we don't want to - change the hard registers mentioned. */ + change the hard registers mentioned, and don't change fixed hard + registers. */ if (REG_P (x) && (REGNO (x) >= FIRST_PSEUDO_REGISTER || (GET_CODE (PATTERN (insn)) != USE + && !fixed_regs[REGNO (x)] && asm_noperands (PATTERN (insn)) < 0))) { cselib_val *val = cselib_lookup (x, GET_MODE (x), 0, VOIDmode); |