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| author | rsandifo <rsandifo@138bc75d-0d04-0410-961f-82ee72b054a4> | 2008-01-30 11:18:27 +0000 |
|---|---|---|
| committer | rsandifo <rsandifo@138bc75d-0d04-0410-961f-82ee72b054a4> | 2008-01-30 11:18:27 +0000 |
| commit | 9a9cbcd200bcb0bd9fc107407a8d1da83c1d25a5 (patch) | |
| tree | 6593f73075d1b463fa35f873cbf27a2fb1776eb3 /gcc/global.c | |
| parent | 365b8932ed9ea077ec66ca18ada47aad2e600b96 (diff) | |
| download | gcc-9a9cbcd200bcb0bd9fc107407a8d1da83c1d25a5.tar.gz | |
gcc/
PR rtl-optimization/34998
* global.c (build_insn_chain): Treat non-subreg_lowpart
SUBREGs of pseudos as clobbering all the words covered by the
SUBREG, not just all the bytes.
* ra-conflict.c (clear_reg_in_live): Likewise. Take the
original df_ref rather than an extract parameter.
(global_conflicts): Update call accordingly.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@131960 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/global.c')
| -rw-r--r-- | gcc/global.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/gcc/global.c b/gcc/global.c index b8a0ec78158..12641a60cba 100644 --- a/gcc/global.c +++ b/gcc/global.c @@ -1501,6 +1501,17 @@ build_insn_chain (void) live_subregs, live_subregs_used, regno, reg); + + if (!DF_REF_FLAGS_IS_SET + (def, DF_REF_STRICT_LOWER_PART)) + { + /* Expand the range to cover entire words. + Bytes added here are "don't care". */ + start = start / UNITS_PER_WORD * UNITS_PER_WORD; + last = ((last + UNITS_PER_WORD - 1) + / UNITS_PER_WORD * UNITS_PER_WORD); + } + /* Ignore the paradoxical bits. */ if ((int)last > live_subregs_used[regno]) last = live_subregs_used[regno]; |