[PATCH] [PowerPC] Remove -ftree-loop-linear from Makefiles

["Tulio Magno Quites Machado Filho" <tuliom at linux dot vnet dot ibm dot com>]

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.

2012-05-14 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.
	* 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.
---
 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 +-
 4 files changed, 6 insertions(+), 6 deletions(-)

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
-- 
1.7.7.6