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| author | Eric Botcazou <ebotcazou@adacore.com> | 2014-11-08 09:17:23 +0000 |
|---|---|---|
| committer | Eric Botcazou <ebotcazou@gcc.gnu.org> | 2014-11-08 09:17:23 +0000 |
| commit | d1b0433b1aba81a6c3e87e867aaf24c6356e4f35 (patch) | |
| tree | 0a7f69c453ba7a515495f989366889d4620975cc | |
| parent | 31cb2db0b28fe254d07194fb68bd95f8372a0457 (diff) | |
| download | gcc-d1b0433b1aba81a6c3e87e867aaf24c6356e4f35.zip gcc-d1b0433b1aba81a6c3e87e867aaf24c6356e4f35.tar.gz gcc-d1b0433b1aba81a6c3e87e867aaf24c6356e4f35.tar.bz2 | |
arm.c (arm_set_return_address): Mark the store as frame related, if any.
* config/arm/arm.c (arm_set_return_address): Mark the store as frame
related, if any.
(thumb_set_return_address): Likewise.
From-SVN: r217251
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/config/arm/arm.c | 12 |
2 files changed, 16 insertions, 2 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index c2ec869..6bfc320 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2014-11-08 Eric Botcazou <ebotcazou@adacore.com> + + * config/arm/arm.c (arm_set_return_address): Mark the store as frame + related, if any. + (thumb_set_return_address): Likewise. + 2014-11-07 Jeff Law <law@redhat.com> PR tree-optimization/61515 diff --git a/gcc/config/arm/arm.c b/gcc/config/arm/arm.c index cc005d6..0552952 100644 --- a/gcc/config/arm/arm.c +++ b/gcc/config/arm/arm.c @@ -29012,7 +29012,11 @@ arm_set_return_address (rtx source, rtx scratch) addr = plus_constant (Pmode, addr, delta); } - emit_move_insn (gen_frame_mem (Pmode, addr), source); + /* The store needs to be marked as frame related in order to prevent + DSE from deleting it as dead if it is based on fp. */ + rtx insn = emit_move_insn (gen_frame_mem (Pmode, addr), source); + RTX_FRAME_RELATED_P (insn) = 1; + add_reg_note (insn, REG_CFA_RESTORE, gen_rtx_REG (Pmode, LR_REGNUM)); } } @@ -29064,7 +29068,11 @@ thumb_set_return_address (rtx source, rtx scratch) else addr = plus_constant (Pmode, addr, delta); - emit_move_insn (gen_frame_mem (Pmode, addr), source); + /* The store needs to be marked as frame related in order to prevent + DSE from deleting it as dead if it is based on fp. */ + rtx insn = emit_move_insn (gen_frame_mem (Pmode, addr), source); + RTX_FRAME_RELATED_P (insn) = 1; + add_reg_note (insn, REG_CFA_RESTORE, gen_rtx_REG (Pmode, LR_REGNUM)); } else emit_move_insn (gen_rtx_REG (Pmode, LR_REGNUM), source); |