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be10a6b132
This needs further investigation, but for now we can get the tested sources into the poky gcc harness Signed-off-by: Koen Kooi <k-kooi@ti.com>
96 lines
2.7 KiB
Diff
96 lines
2.7 KiB
Diff
gcc/
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* config/arm/arm.c (arm_override_options): Override alignments if
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tuning for Cortex-A8.
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(create_fix_barrier, arm_reorg): If aligning to jumps or loops,
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make labels have a size.
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* config/arm/arm.md (VUNSPEC_ALIGN16, VUNSPEC_ALIGN32): New constants.
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(align_16, align_32): New patterns.
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2010-07-26 Julian Brown <julian@codesourcery.com>
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Merge from Sourcery G++ 4.4:
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Mark Shinwell <shinwell@codesourcery.com>
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=== modified file 'gcc/config/arm/arm.c'
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--- old/gcc/config/arm/arm.c 2010-08-10 14:03:02 +0000
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+++ new/gcc/config/arm/arm.c 2010-08-12 11:33:54 +0000
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@@ -1449,6 +1449,16 @@
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chosen. */
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gcc_assert (arm_tune != arm_none);
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+ if (arm_tune == cortexa8 && optimize >= 3)
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+ {
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+ /* These alignments were experimentally determined to improve SPECint
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+ performance on SPECCPU 2000. */
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+ if (align_functions <= 0)
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+ align_functions = 16;
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+ if (align_jumps <= 0)
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+ align_jumps = 16;
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+ }
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+
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tune_flags = all_cores[(int)arm_tune].flags;
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if (target_fp16_format_name)
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@@ -11263,7 +11273,10 @@
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gcc_assert (GET_CODE (from) != BARRIER);
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/* Count the length of this insn. */
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- count += get_attr_length (from);
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+ if (LABEL_P (from) && (align_jumps > 0 || align_loops > 0))
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+ count += MAX (align_jumps, align_loops);
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+ else
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+ count += get_attr_length (from);
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/* If there is a jump table, add its length. */
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tmp = is_jump_table (from);
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@@ -11603,6 +11616,8 @@
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insn = table;
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}
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}
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+ else if (LABEL_P (insn) && (align_jumps > 0 || align_loops > 0))
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+ address += MAX (align_jumps, align_loops);
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}
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fix = minipool_fix_head;
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=== modified file 'gcc/config/arm/arm.md'
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--- old/gcc/config/arm/arm.md 2010-08-12 11:29:02 +0000
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+++ new/gcc/config/arm/arm.md 2010-08-12 11:33:54 +0000
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@@ -135,6 +135,8 @@
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(VUNSPEC_WCMP_EQ 12) ; Used by the iWMMXt WCMPEQ instructions
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(VUNSPEC_WCMP_GTU 13) ; Used by the iWMMXt WCMPGTU instructions
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(VUNSPEC_WCMP_GT 14) ; Used by the iwMMXT WCMPGT instructions
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+ (VUNSPEC_ALIGN16 15) ; Used to force 16-byte alignment.
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+ (VUNSPEC_ALIGN32 16) ; Used to force 32-byte alignment.
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(VUNSPEC_EH_RETURN 20); Use to override the return address for exception
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; handling.
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]
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@@ -11042,6 +11044,24 @@
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"
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)
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+(define_insn "align_16"
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+ [(unspec_volatile [(const_int 0)] VUNSPEC_ALIGN16)]
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+ "TARGET_EITHER"
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+ "*
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+ assemble_align (128);
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+ return \"\";
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+ "
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+)
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+
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+(define_insn "align_32"
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+ [(unspec_volatile [(const_int 0)] VUNSPEC_ALIGN32)]
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+ "TARGET_EITHER"
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+ "*
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+ assemble_align (256);
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+ return \"\";
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+ "
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+)
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+
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(define_insn "consttable_end"
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[(unspec_volatile [(const_int 0)] VUNSPEC_POOL_END)]
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"TARGET_EITHER"
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