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| author | Richard Henderson <rth@cygnus.com> | 1998-07-21 01:54:29 -0700 |
|---|---|---|
| committer | Richard Henderson <rth@gcc.gnu.org> | 1998-07-21 01:54:29 -0700 |
| commit | bd80fbde8eb422f5afdbfbcace63db46c80e44bf (patch) | |
| tree | ee3c58945965b8be574214e023518662b3638e86 | |
| parent | 50ea20cfa8f01bff548cb6a4b655f76fb1f09863 (diff) | |
| download | gcc-bd80fbde8eb422f5afdbfbcace63db46c80e44bf.zip gcc-bd80fbde8eb422f5afdbfbcace63db46c80e44bf.tar.gz gcc-bd80fbde8eb422f5afdbfbcace63db46c80e44bf.tar.bz2 | |
* flow.c (regno_uninitialized): Fixed regs are never uninitialized.
From-SVN: r21321
| -rw-r--r-- | gcc/ChangeLog | 4 | ||||
| -rw-r--r-- | gcc/flow.c | 12 |
2 files changed, 11 insertions, 5 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 7452e50..68e284c 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,7 @@ +Tue Jul 21 08:55:09 1998 Richard Henderson <rth@cygnus.com> + + * flow.c (regno_uninitialized): Fixed regs are never uninitialized. + Tue Jul 21 00:31:01 1998 Jeffrey A Law (law@cygnus.com) * gcc.c (do_spec): Call "error" not "warning". @@ -2030,10 +2030,10 @@ libcall_dead_p (x, needed, note, insn) return 1; } -/* Return 1 if register REGNO was used before it was set. - In other words, if it is live at function entry. - Don't count global register variables or variables in registers - that can be used for function arg passing, though. */ +/* Return 1 if register REGNO was used before it was set, i.e. if it is + live at function entry. Don't count global register variables, variables + in registers that can be used for function arg passing, or variables in + fixed hard registers. */ int regno_uninitialized (regno) @@ -2041,7 +2041,9 @@ regno_uninitialized (regno) { if (n_basic_blocks == 0 || (regno < FIRST_PSEUDO_REGISTER - && (global_regs[regno] || FUNCTION_ARG_REGNO_P (regno)))) + && (global_regs[regno] + || fixed_regs[regno] + || FUNCTION_ARG_REGNO_P (regno)))) return 0; return REGNO_REG_SET_P (basic_block_live_at_start[0], regno); |