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| author | Andreas Krebbel <krebbel@linux.vnet.ibm.com> | 2018-04-06 07:45:42 +0000 |
|---|---|---|
| committer | Andreas Krebbel <krebbel@gcc.gnu.org> | 2018-04-06 07:45:42 +0000 |
| commit | aad98a61044276f322dbdb9876e83ead7d8a9e60 (patch) | |
| tree | a9298538dcca93788364c3e520d19d6cc4791028 /gcc/tree-dfa.c | |
| parent | bce89076ce03ff9bcf89362477cff548a585bcdd (diff) | |
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IBM Z: Use the dedicated NOP instructions for "nop"
We still use lr r0,r0 as a NOP instruction although we have some kind
of dedicated NOP instruction (nopr) which maps to a "branch never".
As a side-effect this fixes testcases scanning for NOPs
e.g. patchable_function_entry-*.
As another side-effect this makes it difficult to distingiush NOPs
generated for hotpatching from NOPs added when using -O0 to attach
location information to it. Hence I had to make sure that the hotpatch
testcases get skipped when compiling without optimization.
gcc/ChangeLog:
2018-04-06 Andreas Krebbel <krebbel@linux.vnet.ibm.com>
* config/s390/s390.c (s390_z10_optimize_cmp): Expand dedicated NOP
instructions.
* config/s390/s390.md (UNSPECV_NOP_LR_0, UNSPECV_NOP_LR_1): New
constant definitions.
("nop"): lr 0,0 -> nopr r0
("nop_lr0", "nop_lr1"): New insn definitions.
gcc/testsuite/ChangeLog:
2018-04-06 Andreas Krebbel <krebbel@linux.vnet.ibm.com>
* gcc.target/s390/s390.exp: Remove -O0 from list of torture
options.
* gcc.target/s390/hotpatch-1.c: Skip when building without
optimization.
* gcc.target/s390/hotpatch-10.c: Likewise.
* gcc.target/s390/hotpatch-11.c: Likewise.
* gcc.target/s390/hotpatch-12.c: Likewise.
* gcc.target/s390/hotpatch-13.c: Likewise.
* gcc.target/s390/hotpatch-14.c: Likewise.
* gcc.target/s390/hotpatch-15.c: Likewise.
* gcc.target/s390/hotpatch-16.c: Likewise.
* gcc.target/s390/hotpatch-17.c: Likewise.
* gcc.target/s390/hotpatch-18.c: Likewise.
* gcc.target/s390/hotpatch-19.c: Likewise.
* gcc.target/s390/hotpatch-2.c: Likewise.
* gcc.target/s390/hotpatch-3.c: Likewise.
* gcc.target/s390/hotpatch-4.c: Likewise.
* gcc.target/s390/hotpatch-5.c: Likewise.
* gcc.target/s390/hotpatch-6.c: Likewise.
* gcc.target/s390/hotpatch-7.c: Likewise.
* gcc.target/s390/hotpatch-8.c: Likewise.
* gcc.target/s390/hotpatch-9.c: Likewise.
From-SVN: r259164
Diffstat (limited to 'gcc/tree-dfa.c')
0 files changed, 0 insertions, 0 deletions