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http://sources.redhat.com/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=a88b64b9bbf8b2a315206e211250c5529534a477

commit a88b64b9bbf8b2a315206e211250c5529534a477
Author: Tulio Magno Quites Machado Filho <tuliom@linux.vnet.ibm.com>
Date:   Fri May 18 08:50:33 2012 -0500

    [PowerPC] Remove -ftree-loop-linear from Makefiles
    
    In the past the "-ftree-loop-linear" switch provided a measurable
    improvement in performance for certain functions.  At some point it
    was assigned as the responsibility of Graphite in GCC.  It has been
    found that even with Graphite enabled these flags no longer perform
    any appreciable improvement over the baseline.
    
    Graphite now has some open bugs which need to be fixed in order for it
    to provide measurable performance improvements but it lacks active
    development.  As a result some compiler distributors may disable
    Graphite.  If Graphite is disabled then building GLIBC will fail if
    the "-ftree-loop-linear" switch is used.
    
    This patch removes the use of "-ftree-loop-linear" as unnecessary.

diff --git a/ChangeLog b/ChangeLog
index 50bc035..9d07286 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,15 @@
+2012-05-18  Tulio Magno Quites Machado Filho  <tuliom@linux.vnet.ibm.com>
+
+	* sysdeps/powerpc/powerpc32/power4/Makefile (CFLAGS-wordcopy.c,
+	CFLAGS-memmove.c): remove -ftree-loop-linear which causes a build
+	failure if the compiler has Graphite support disabled.
+	* sysdeps/powerpc/powerpc32/power4/fpu/Makefile (CFLAGS-mpa.c):
+	Likewise.
+	* sysdeps/powerpc/powerpc64/power4/Makefile (CFLAGS-wordcopy.c,
+	CFLAGS-memmove.c): Likewise.
+	* sysdeps/powerpc/powerpc64/power4/fpu/Makefile (CFLAGS-mpa.c):
+	Likewise.
+
 2012-05-18  H.J. Lu  <hongjiu.lu@intel.com>
 
 	* sysdeps/x86_64/x32/_itoa.h: New file.
diff --git a/sysdeps/powerpc/powerpc32/power4/Makefile b/sysdeps/powerpc/powerpc32/power4/Makefile
index 60aa508..ba06adb 100644
--- a/sysdeps/powerpc/powerpc32/power4/Makefile
+++ b/sysdeps/powerpc/powerpc32/power4/Makefile
@@ -1,6 +1,6 @@
 # Makefile fragment for POWER4/5/5+.
 
 ifeq ($(subdir),string)
-CFLAGS-wordcopy.c += --param max-variable-expansions-in-unroller=2 --param max-unroll-times=2 -funroll-loops -fpeel-loops -ftree-loop-linear
-CFLAGS-memmove.c += --param max-variable-expansions-in-unroller=2 --param max-unroll-times=2 -funroll-loops -fpeel-loops -ftree-loop-linear
+CFLAGS-wordcopy.c += --param max-variable-expansions-in-unroller=2 --param max-unroll-times=2 -funroll-loops -fpeel-loops
+CFLAGS-memmove.c += --param max-variable-expansions-in-unroller=2 --param max-unroll-times=2 -funroll-loops -fpeel-loops
 endif
diff --git a/sysdeps/powerpc/powerpc32/power4/fpu/Makefile b/sysdeps/powerpc/powerpc32/power4/fpu/Makefile
index a6fa75e..f487ed6 100644
--- a/sysdeps/powerpc/powerpc32/power4/fpu/Makefile
+++ b/sysdeps/powerpc/powerpc32/power4/fpu/Makefile
@@ -1,5 +1,5 @@
 # Makefile fragment for POWER4/5/5+ with FPU.
 
 ifeq ($(subdir),math)
-CFLAGS-mpa.c += --param max-unroll-times=4 -funroll-loops -fpeel-loops -ftree-loop-linear 
+CFLAGS-mpa.c += --param max-unroll-times=4 -funroll-loops -fpeel-loops
 endif
diff --git a/sysdeps/powerpc/powerpc64/power4/Makefile b/sysdeps/powerpc/powerpc64/power4/Makefile
index 60aa508..ba06adb 100644
--- a/sysdeps/powerpc/powerpc64/power4/Makefile
+++ b/sysdeps/powerpc/powerpc64/power4/Makefile
@@ -1,6 +1,6 @@
 # Makefile fragment for POWER4/5/5+.
 
 ifeq ($(subdir),string)
-CFLAGS-wordcopy.c += --param max-variable-expansions-in-unroller=2 --param max-unroll-times=2 -funroll-loops -fpeel-loops -ftree-loop-linear
-CFLAGS-memmove.c += --param max-variable-expansions-in-unroller=2 --param max-unroll-times=2 -funroll-loops -fpeel-loops -ftree-loop-linear
+CFLAGS-wordcopy.c += --param max-variable-expansions-in-unroller=2 --param max-unroll-times=2 -funroll-loops -fpeel-loops
+CFLAGS-memmove.c += --param max-variable-expansions-in-unroller=2 --param max-unroll-times=2 -funroll-loops -fpeel-loops
 endif
diff --git a/sysdeps/powerpc/powerpc64/power4/fpu/Makefile b/sysdeps/powerpc/powerpc64/power4/fpu/Makefile
index 89dfa5e..f8bb3ef 100644
--- a/sysdeps/powerpc/powerpc64/power4/fpu/Makefile
+++ b/sysdeps/powerpc/powerpc64/power4/fpu/Makefile
@@ -1,5 +1,5 @@
 # Makefile fragment for POWER4/5/5+ platforms with FPU.
 
 ifeq ($(subdir),math)
-CFLAGS-mpa.c += --param max-unroll-times=4 -funroll-loops -fpeel-loops -ftree-loop-linear 
+CFLAGS-mpa.c += --param max-unroll-times=4 -funroll-loops -fpeel-loops
 endif

-----------------------------------------------------------------------

Summary of changes:
 ChangeLog                                     |   12 ++++++++++++
 sysdeps/powerpc/powerpc32/power4/Makefile     |    4 ++--
 sysdeps/powerpc/powerpc32/power4/fpu/Makefile |    2 +-
 sysdeps/powerpc/powerpc64/power4/Makefile     |    4 ++--
 sysdeps/powerpc/powerpc64/power4/fpu/Makefile |    2 +-
 5 files changed, 18 insertions(+), 6 deletions(-)


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