diff options
| author | kenner <kenner@138bc75d-0d04-0410-961f-82ee72b054a4> | 1997-01-29 21:00:25 +0000 |
|---|---|---|
| committer | kenner <kenner@138bc75d-0d04-0410-961f-82ee72b054a4> | 1997-01-29 21:00:25 +0000 |
| commit | d4c423d6c4e46bf4add631111c5b351642055cd7 (patch) | |
| tree | c9cea23da69849d09d230e9e8dac7e6e68d6d0f7 /gcc/flow.c | |
| parent | 8671d9aed15a97371ed7ef13830bc29e5304fa28 (diff) | |
| download | gcc-d4c423d6c4e46bf4add631111c5b351642055cd7.tar.gz | |
(regno_uninitialized): Return 0 if reg is used for args.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@13562 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/flow.c')
| -rw-r--r-- | gcc/flow.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/gcc/flow.c b/gcc/flow.c index 86d72286331..75948c562bd 100644 --- a/gcc/flow.c +++ b/gcc/flow.c @@ -1,5 +1,5 @@ /* Data flow analysis for GNU compiler. - Copyright (C) 1987, 88, 92, 93, 94, 95, 1996 Free Software Foundation, Inc. + Copyright (C) 1987, 88, 92-96, 1997 Free Software Foundation, Inc. This file is part of GNU CC. @@ -1897,14 +1897,16 @@ libcall_dead_p (x, needed, note, insn) /* 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, though. */ + Don't count global register variables or variables in registers + that can be used for function arg passing, though. */ int regno_uninitialized (regno) int regno; { if (n_basic_blocks == 0 - || (regno < FIRST_PSEUDO_REGISTER && global_regs[regno])) + || (regno < FIRST_PSEUDO_REGISTER + && (global_regs[regno] || FUNCTION_ARG_REGNO_P (regno)))) return 0; return (basic_block_live_at_start[0][regno / REGSET_ELT_BITS] |