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| author | Bernd Schmidt <bernd.schmidt@analog.com> | 2005-06-02 08:55:01 +0000 |
|---|---|---|
| committer | Bernd Schmidt <bernds@gcc.gnu.org> | 2005-06-02 08:55:01 +0000 |
| commit | ccb4e87e83e9f1e21ba9c79ce21f2d31dcf16a51 (patch) | |
| tree | 08e0583372079c1101e18aa959b090017f5a7ca5 | |
| parent | fbd4ef4ccdf895dd2833feee248ad5c0d069f418 (diff) | |
| download | gcc-ccb4e87e83e9f1e21ba9c79ce21f2d31dcf16a51.zip gcc-ccb4e87e83e9f1e21ba9c79ce21f2d31dcf16a51.tar.gz gcc-ccb4e87e83e9f1e21ba9c79ce21f2d31dcf16a51.tar.bz2 | |
local-alloc.c (update_equiv_regs): When substituting sole definition into sole use of a reg...
* local-alloc.c (update_equiv_regs): When substituting sole definition
into sole use of a reg, delete it from liveness information.
From-SVN: r100483
| -rw-r--r-- | gcc/ChangeLog | 2 | ||||
| -rw-r--r-- | gcc/local-alloc.c | 7 |
2 files changed, 8 insertions, 1 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 9891a77..b336751 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -2,6 +2,8 @@ * reload1.c (reload): Undo 2005-04-20 change. Make sure we detect the correct set of init_insns that need deletion. + * local-alloc.c (update_equiv_regs): When substituting sole definition + into sole use of a reg, delete it from liveness information. 2005-06-02 Kaz Kojima <kkojima@gcc.gnu.org> diff --git a/gcc/local-alloc.c b/gcc/local-alloc.c index 1cbc489..0175308 100644 --- a/gcc/local-alloc.c +++ b/gcc/local-alloc.c @@ -991,7 +991,7 @@ update_equiv_regs (void) /* Now scan all regs killed in an insn to see if any of them are registers only used that once. If so, see if we can replace the - reference with the equivalent from. If we can, delete the + reference with the equivalent form. If we can, delete the initializing reference and this register will go away. If we can't replace the reference, and the initializing reference is within the same loop (or in an inner loop), then move the register @@ -1077,6 +1077,11 @@ update_equiv_regs (void) reg_equiv[regno].init_insns = XEXP (reg_equiv[regno].init_insns, 1); + + /* Remember to clear REGNO from all basic block's live + info. */ + SET_REGNO_REG_SET (&cleared_regs, regno); + clear_regnos++; } /* Move the initialization of the register to just before INSN. Update the flow information. */ |