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| author | Richard Stallman <rms@gnu.org> | 1992-08-07 04:00:44 +0000 |
|---|---|---|
| committer | Richard Stallman <rms@gnu.org> | 1992-08-07 04:00:44 +0000 |
| commit | d8c8b8e36bf0a82d38f69fa8e918abc49bd2c25a (patch) | |
| tree | b2545cdb1afb814415779c745c550a2d8f523069 | |
| parent | 1f6fc4de69d7ece6ff5f988f3c600d0f0493cbc7 (diff) | |
| download | gcc-d8c8b8e36bf0a82d38f69fa8e918abc49bd2c25a.zip gcc-d8c8b8e36bf0a82d38f69fa8e918abc49bd2c25a.tar.gz gcc-d8c8b8e36bf0a82d38f69fa8e918abc49bd2c25a.tar.bz2 | |
(mark_used_regs): Do recurse in setting of global hard reg.
Do set reg_next_use for global hard reg.
From-SVN: r1778
| -rw-r--r-- | gcc/flow.c | 11 |
1 files changed, 9 insertions, 2 deletions
@@ -1524,6 +1524,7 @@ insn_dead_p (x, needed, call_ok) register REGSET_ELT_TYPE bit = (REGSET_ELT_TYPE) 1 << (regno % REGSET_ELT_BITS); + /* Don't delete insns to set global regs. */ if ((regno < FIRST_PSEUDO_REGISTER && global_regs[regno]) /* Make sure insns to set frame pointer aren't deleted. */ || regno == FRAME_POINTER_REGNUM @@ -2167,7 +2168,11 @@ mark_used_regs (needed, live, x, final, insn) /* No death notes for global register variables; their values are live after this function exits. */ if (global_regs[regno]) - return; + { + if (final) + reg_next_use[regno] = insn; + return; + } n = HARD_REGNO_NREGS (regno, GET_MODE (x)); while (--n > 0) @@ -2311,7 +2316,9 @@ mark_used_regs (needed, live, x, final, insn) #if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM && ! (regno == ARG_POINTER_REGNUM && fixed_regs[regno]) #endif - && ! (regno < FIRST_PSEUDO_REGISTER && global_regs[regno])) + ) + /* We used to exclude global_regs here, but that seems wrong. + Storing in them is like storing in mem. */ { mark_used_regs (needed, live, SET_SRC (x), final, insn); if (mark_dest) |