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| author | J"orn Rennecke <amylaar@cygnus.co.uk> | 1998-05-01 17:40:53 +0000 |
|---|---|---|
| committer | Joern Rennecke <amylaar@gcc.gnu.org> | 1998-05-01 18:40:53 +0100 |
| commit | b60a8416357bb6e8166547bef7bc67c56f104557 (patch) | |
| tree | ffd76e0f0eda23e68b7a122b84484b965f5142b4 /gcc/rtl.texi | |
| parent | bd64e40c54cbc7a94acf291e2011346caa637b6e (diff) | |
| download | gcc-b60a8416357bb6e8166547bef7bc67c56f104557.zip gcc-b60a8416357bb6e8166547bef7bc67c56f104557.tar.gz gcc-b60a8416357bb6e8166547bef7bc67c56f104557.tar.bz2 | |
reload.c (find_reloads): Emit USEs to mark where a pseudo is reloaced with the MEM of its stack slot.
* reload.c (find_reloads): Emit USEs to mark where a pseudo
is reloaced with the MEM of its stack slot.
* reload1.c (cannot_omit_stores): Delete.
(reload): Don't initialize it.
Don't apply avoid_return_reg logic to USEs.
When done, remove USEs that have a REG_EQUAL note on them.
(emit_reload_insns): Handle case where we have inherited a MEM.
(delete_output_reload): Don't use cannot_omit_stores.
From-SVN: r19508
Diffstat (limited to 'gcc/rtl.texi')
| -rw-r--r-- | gcc/rtl.texi | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/gcc/rtl.texi b/gcc/rtl.texi index a715b8a..0127fce 100644 --- a/gcc/rtl.texi +++ b/gcc/rtl.texi @@ -1892,6 +1892,10 @@ it may not be apparent why this is so. Therefore, the compiler will not attempt to delete previous instructions whose only effect is to store a value in @var{x}. @var{x} must be a @code{reg} expression. +During the reload phase, an insn that has a @code{use} as pattern +can carry a reg_equal note. These @code{use} insns will be deleted +before the reload phase exits. + During the delayed branch scheduling phase, @var{x} may be an insn. This indicates that @var{x} previously was located at this place in the code and its data dependencies need to be taken into account. These |