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| author | Richard Henderson <rth@redhat.com> | 2002-01-30 10:07:44 -0800 |
|---|---|---|
| committer | Richard Henderson <rth@gcc.gnu.org> | 2002-01-30 10:07:44 -0800 |
| commit | 5748ebeb998a01e22e9e2ee1e649f46c42e6bece (patch) | |
| tree | 5bfe6696efdf613c71ba47adae1a6cf747f80eef | |
| parent | 20d32cc2b51f9f9d649059e04c83e627226f494e (diff) | |
| download | gcc-5748ebeb998a01e22e9e2ee1e649f46c42e6bece.zip gcc-5748ebeb998a01e22e9e2ee1e649f46c42e6bece.tar.gz gcc-5748ebeb998a01e22e9e2ee1e649f46c42e6bece.tar.bz2 | |
* sched-deps.c (sched_analyze): Make a call read the frame pointer.
From-SVN: r49341
| -rw-r--r-- | gcc/ChangeLog | 4 | ||||
| -rw-r--r-- | gcc/sched-deps.c | 19 |
2 files changed, 18 insertions, 5 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 6598e92..dc3476a 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,7 @@ +2002-01-30 Richard Henderson <rth@redhat.com> + + * sched-deps.c (sched_analyze): Make a call read the frame pointer. + 2002-01-30 Zack Weinberg <zack@codesourcery.com> * expmed.c (emit_store_flag): Call protect_from_queue on op0 and op1. diff --git a/gcc/sched-deps.c b/gcc/sched-deps.c index 384bab7..9f20aad 100644 --- a/gcc/sched-deps.c +++ b/gcc/sched-deps.c @@ -1267,21 +1267,30 @@ sched_analyze (deps, head, tail) } else { - /* A call may read and modify global register variables. - Other call-clobbered hard regs may be clobbered. We - don't know what set of fixed registers might be used - by the function. It is certain that the stack pointer - is among them, but be conservative. */ for (i = 0; i < FIRST_PSEUDO_REGISTER; i++) + /* A call may read and modify global register variables. */ if (global_regs[i]) { SET_REGNO_REG_SET (reg_pending_sets, i); SET_REGNO_REG_SET (reg_pending_uses, i); } + /* Other call-clobbered hard regs may be clobbered. */ else if (TEST_HARD_REG_BIT (regs_invalidated_by_call, i)) SET_REGNO_REG_SET (reg_pending_clobbers, i); + /* We don't know what set of fixed registers might be used + by the function, but it is certain that the stack pointer + is among them, but be conservative. */ else if (fixed_regs[i]) SET_REGNO_REG_SET (reg_pending_uses, i); + /* The frame pointer is normally not used by the function + itself, but by the debugger. */ + /* ??? MIPS o32 is an exception. It uses the frame pointer + in the macro expansion of jal but does not represent this + fact in the call_insn rtl. */ + else if (i == FRAME_POINTER_REGNUM + || (i == HARD_FRAME_POINTER_REGNUM + && (! reload_completed || frame_pointer_needed))) + SET_REGNO_REG_SET (reg_pending_uses, i); } /* For each insn which shouldn't cross a call, add a dependence |