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warning: 'assume_aligned' attribute directive ignored #17

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warning: 'assume_aligned' attribute directive ignored #17

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227c335
warning: 'assume_aligned' attribute directive ignored
khavishbhundoo Mar 11, 2017
5091fba
warning: 'assume_aligned' attribute directive ignored
khavishbhundoo Mar 11, 2017
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1 change: 1 addition & 0 deletions butteraugli/Makefile
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Original file line number Diff line number Diff line change
@@ -1,6 +1,7 @@
LDLIBS += -lpng -ljpeg
CXXFLAGS += -std=c++11 -I..
LINK.o = $(LINK.cc)
CFLAGS += $(echo 'void* my_alloc1() __attribute__((assume_aligned(16)));' | gcc -x c - -c -o /dev/null -Werror && echo -DHAS_ASSUME_ALIGNED)

all: butteraugli.o butteraugli_main.o butteraugli

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7 changes: 4 additions & 3 deletions butteraugli/butteraugli.h
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Expand Up @@ -123,10 +123,11 @@ bool ButteraugliAdaptiveQuantization(size_t xsize, size_t ysize,
#define BUTTERAUGLI_RESTRICT __restrict__
#endif

#ifdef _MSC_VER
#define BUTTERAUGLI_CACHE_ALIGNED_RETURN /* not supported */
#else

#ifdef HAS_ASSUME_ALIGNED
#define BUTTERAUGLI_CACHE_ALIGNED_RETURN __attribute__((assume_aligned(64)))
#else
#define BUTTERAUGLI_CACHE_ALIGNED_RETURN /* not supported */
#endif

// Alias for unchangeable, non-aliased pointers. T is a pointer type,
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