[Bug 1522410] Re: [Ubuntu 16.04] Enable P9 toolchain

[Matthias Klose]

I see some regressions when building from the ibm branch:

@@ -26,14 +26,15 @@
 FAIL: g++.dg/opt/pr65554.C  -std=gnu++14 (test for excess errors)
 XPASS: g++.dg/tls/thread_local-order2.C  -std=c++11 execution test
 XPASS: g++.dg/tls/thread_local-order2.C  -std=c++14 execution test
+FAIL: c-c++-common/ubsan/float-cast-overflow-1.c   -O2  output pattern test
+FAIL: c-c++-common/ubsan/float-cast-overflow-2.c   -O0  output pattern test
+FAIL: c-c++-common/ubsan/float-cast-overflow-2.c   -O3 -g  output pattern test
 FAIL: c-c++-common/ubsan/float-cast-overflow-8.c   -O2  output pattern test
 FAIL: c-c++-common/ubsan/float-cast-overflow-8.c   -O2 -flto -fno-use-linker-plugin -flto-partition=none  output pattern test
 FAIL: c-c++-common/ubsan/float-cast-overflow-8.c   -O2 -flto -fuse-linker-plugin -fno-fat-lto-objects  output pattern test
 FAIL: c-c++-common/ubsan/overflow-mul-4.c   -O0  output pattern test
-FAIL: c-c++-common/ubsan/overflow-mul-4.c   -O1  output pattern test
 FAIL: c-c++-common/ubsan/overflow-mul-4.c   -O2  output pattern test
 FAIL: c-c++-common/ubsan/overflow-mul-4.c   -O2 -flto -fno-use-linker-plugin -flto-partition=none  output pattern test
-FAIL: c-c++-common/ubsan/overflow-mul-4.c   -O2 -flto -fuse-linker-plugin -fno-fat-lto-objects  output pattern test
 FAIL: c-c++-common/ubsan/overflow-mul-4.c   -O3 -fomit-frame-pointer  output pattern test
 FAIL: c-c++-common/ubsan/overflow-mul-4.c   -O3 -fomit-frame-pointer -funroll-all-loops -finline-functions  output pattern test
 FAIL: c-c++-common/ubsan/overflow-mul-4.c   -O3 -fomit-frame-pointer -funroll-loops  output pattern test

@@ -143,8 +143,8 @@
 FAIL: gcc.dg/tree-ssa/ivopts-lt-2.c scan-tree-dump-times ivopts "PHI" 1
 FAIL: gcc.dg/tree-ssa/ivopts-lt-2.c scan-tree-dump-times ivopts "p_[0-9]* <" 1
 FAIL: c-c++-common/ubsan/float-cast-overflow-2.c   -O0  output pattern test
-FAIL: c-c++-common/ubsan/float-cast-overflow-2.c   -O1  output pattern test
-FAIL: c-c++-common/ubsan/float-cast-overflow-2.c   -O2 -flto -fuse-linker-plugin -fno-fat-lto-objects  output pattern test
+FAIL: c-c++-common/ubsan/float-cast-overflow-2.c   -O2  output pattern test
+FAIL: c-c++-common/ubsan/float-cast-overflow-2.c   -Os  output pattern test
 FAIL: c-c++-common/ubsan/float-cast-overflow-8.c   -O2  output pattern test
 FAIL: c-c++-common/ubsan/float-cast-overflow-8.c   -O2 -flto -fno-use-linker-plugin -flto-partition=none  output pattern test
 FAIL: c-c++-common/ubsan/float-cast-overflow-8.c   -O2 -flto -fuse-linker-plugin -fno-fat-lto-objects  output pattern test
@@ -153,7 +153,6 @@
 FAIL: c-c++-common/ubsan/overflow-mul-4.c   -O2  output pattern test
 FAIL: c-c++-common/ubsan/overflow-mul-4.c   -O2 -flto -fno-use-linker-plugin -flto-partition=none  output pattern test
 FAIL: c-c++-common/ubsan/overflow-mul-4.c   -O2 -flto -fuse-linker-plugin -fno-fat-lto-objects  output pattern test
-FAIL: c-c++-common/ubsan/overflow-mul-4.c   -O3 -fomit-frame-pointer  output pattern test
 FAIL: c-c++-common/ubsan/overflow-mul-4.c   -O3 -fomit-frame-pointer -funroll-all-loops -finline-functions  output pattern test
 FAIL: c-c++-common/ubsan/overflow-mul-4.c   -O3 -fomit-frame-pointer -funroll-loops  output pattern test
 FAIL: c-c++-common/ubsan/overflow-mul-4.c   -O3 -g  output pattern test

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https://bugs.launchpad.net/bugs/1522410

Title:
  [Ubuntu 16.04] Enable P9 toolchain

Status in gcc-5 package in Ubuntu:
  Triaged

Bug description:
  This is a feature request to track the inclusion of POWER9 enabled in
  Ubuntu.

  This is required as a building block for POWER9 development in Ubuntu
  16.04. The final goal is to have Ubuntu 17.04 as the primary distro to
  (partially?) support POWER9 machines.

  Mirroring for Canonical awareness. A backport will be required.

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