diff options
| author | J"orn Rennecke <joern.rennecke@superh.com> | 2003-04-03 16:21:48 +0000 |
|---|---|---|
| committer | Joern Rennecke <amylaar@gcc.gnu.org> | 2003-04-03 17:21:48 +0100 |
| commit | 8d3b0953482c3e696d4173a8de504c84e0304953 (patch) | |
| tree | 03ac5b90c87f8eae24b9e5827e9023f5b347e17b | |
| parent | de94b46c5c8e451b304c51453d006cf08a343338 (diff) | |
| download | gcc-8d3b0953482c3e696d4173a8de504c84e0304953.zip gcc-8d3b0953482c3e696d4173a8de504c84e0304953.tar.gz gcc-8d3b0953482c3e696d4173a8de504c84e0304953.tar.bz2 | |
* Avoid clash of temp register for restoring target registers
with EH_RETURN_STACKADJ_RTX; use multiple registers in round-robin
fashion.
From-SVN: r65202
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/config/sh/sh.c | 14 |
2 files changed, 16 insertions, 4 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 3d9392b..286ac09 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +Thu Apr 3 17:08:09 2003 J"orn Rennecke <joern.rennecke@superh.com> + + * Avoid clash of temp register for restoring target registers + with EH_RETURN_STACKADJ_RTX; use multiple registers in round-robin + fashion. + 2003-04-03 Kaveh R. Ghazi <ghazi@caip.rutgers.edu> * gengtype-lex.l (IWORD): Add CHAR_BITFIELD. diff --git a/gcc/config/sh/sh.c b/gcc/config/sh/sh.c index 501e1da..d81a82a 100644 --- a/gcc/config/sh/sh.c +++ b/gcc/config/sh/sh.c @@ -5198,6 +5198,7 @@ sh_expand_epilogue () int sp_in_r0 = 0; int align; rtx r0 = gen_rtx_REG (Pmode, R0_REG); + int tmp_regno = R20_REG; /* We loop twice: first, we save 8-byte aligned registers in the higher addresses, that are known to be aligned. Then, we @@ -5312,10 +5313,15 @@ sh_expand_epilogue () } else if (TARGET_REGISTER_P (i)) { - rtx r1 = gen_rtx_REG (mode, R1_REG); - - insn = emit_move_insn (r1, mem_rtx); - mem_rtx = r1; + rtx tmp_reg = gen_rtx_REG (mode, tmp_regno); + + /* Give the scheduler a bit of freedom by using R20..R23 + in a round-robin fashion. Don't use R1 here because + we want to use it for EH_RETURN_STACKADJ_RTX. */ + insn = emit_move_insn (tmp_reg, mem_rtx); + mem_rtx = tmp_reg; + if (++tmp_regno > R23_REG) + tmp_regno = R20_REG; } insn = emit_move_insn (reg_rtx, mem_rtx); |