From 637ece3f9ee580884f8d84ed994fdb473c994ec7 Mon Sep 17 00:00:00 2001 From: Max Filippov Date: Mon, 23 Feb 2015 23:35:31 +0000 Subject: [PATCH] xtensa: align data naturally when optimizing for size gcc for xtensa always aligns data at least to a word boundary, even when it has smaller natural alignment. This results in unexpectedly high data section sizes and unreasonable amount of wasted space when linking objects compiled with -fdata-sections flag. Align data naturally when optimization for size is enabled. 2015-02-22 Max Filippov gcc/ * config/xtensa/xtensa.h (CONSTANT_ALIGNMENT, DATA_ALIGNMENT): use natural alignment when optimizing for size. From-SVN: r220923 --- gcc/ChangeLog | 5 +++++ gcc/config/xtensa/xtensa.h | 5 +++-- 2 files changed, 8 insertions(+), 2 deletions(-) diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 843716d5b4d..02e60b77dc2 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2015-02-22 Max Filippov + + * config/xtensa/xtensa.h (CONSTANT_ALIGNMENT, DATA_ALIGNMENT): + use natural alignment when optimizing for size. + 2015-02-23 Kaz Kojima PR target/65153 diff --git a/gcc/config/xtensa/xtensa.h b/gcc/config/xtensa/xtensa.h index 0de072b16c3..74ca240b4e6 100644 --- a/gcc/config/xtensa/xtensa.h +++ b/gcc/config/xtensa/xtensa.h @@ -174,7 +174,8 @@ extern unsigned xtensa_current_frame_size; constants to be word aligned so that 'strcpy' calls that copy constants can be done inline. */ #define CONSTANT_ALIGNMENT(EXP, ALIGN) \ - ((TREE_CODE (EXP) == STRING_CST || TREE_CODE (EXP) == CONSTRUCTOR) \ + (!optimize_size && \ + (TREE_CODE (EXP) == STRING_CST || TREE_CODE (EXP) == CONSTRUCTOR) \ && (ALIGN) < BITS_PER_WORD \ ? BITS_PER_WORD \ : (ALIGN)) @@ -186,7 +187,7 @@ extern unsigned xtensa_current_frame_size; that copy constants to character arrays can be done inline. */ #undef DATA_ALIGNMENT #define DATA_ALIGNMENT(TYPE, ALIGN) \ - ((((ALIGN) < BITS_PER_WORD) \ + (!optimize_size && (((ALIGN) < BITS_PER_WORD) \ && (TREE_CODE (TYPE) == ARRAY_TYPE \ || TREE_CODE (TYPE) == UNION_TYPE \ || TREE_CODE (TYPE) == RECORD_TYPE)) ? BITS_PER_WORD : (ALIGN)) -- 2.30.2