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| author | Jeff Law <law@redhat.com> | 2019-03-27 10:18:06 -0600 |
|---|---|---|
| committer | Jeff Law <law@gcc.gnu.org> | 2019-03-27 10:18:06 -0600 |
| commit | 52295c2de4adcd0f5a6ee9b5a4f57cd156182cf0 (patch) | |
| tree | 28016165b85dfcc8719ec17c7574c11867044d6f /gcc/regcprop.c | |
| parent | ce4609958f8db5cd64ec1c3bec624a36d8b35812 (diff) | |
| download | gcc-52295c2de4adcd0f5a6ee9b5a4f57cd156182cf0.zip gcc-52295c2de4adcd0f5a6ee9b5a4f57cd156182cf0.tar.gz gcc-52295c2de4adcd0f5a6ee9b5a4f57cd156182cf0.tar.bz2 | |
re PR rtl-optimization/87761 ([MIPS] New FAIL: gcc.target/mips/fix-r4000-10.c -O1 start with r265398)
PR rtl-optimization/87761
PR rtl-optimization/89826
* regcprop.c (copyprop_hardreg_forward_1): Move may_trap_p test
slightly later.
(pass_cprop_hardreg::execute): Call df_analyze after adding the
note problem to get REG_DEAD/REG_UNUSED notes updated.
PR rtl-optimization/87761
PR rtl-optimization/89826
* gcc.c-torture/execute/pr89826.c: New test.
From-SVN: r269967
Diffstat (limited to 'gcc/regcprop.c')
| -rw-r--r-- | gcc/regcprop.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/gcc/regcprop.c b/gcc/regcprop.c index 8ca523f..3efe21f 100644 --- a/gcc/regcprop.c +++ b/gcc/regcprop.c @@ -800,9 +800,9 @@ copyprop_hardreg_forward_1 (basic_block bb, struct value_data *vd) /* Detect obviously dead sets (via REG_UNUSED notes) and remove them. */ if (set - && !may_trap_p (set) && !RTX_FRAME_RELATED_P (insn) && INSN_P (insn) + && !may_trap_p (set) && find_reg_note (insn, REG_UNUSED, SET_DEST (set)) && !side_effects_p (SET_SRC (set)) && !side_effects_p (SET_DEST (set))) @@ -1293,7 +1293,10 @@ pass_cprop_hardreg::execute (function *fun) auto_sbitmap visited (last_basic_block_for_fn (fun)); bitmap_clear (visited); + /* We need accurate notes. Earlier passes such as if-conversion may + leave notes in an inconsistent state. */ df_note_add_problem (); + df_analyze (); /* It is tempting to set DF_LR_RUN_DCE, but DCE may choose to delete an insn and this pass would not have visibility into the removal. |