From daea7777cee46549b8a43624f32ec66b4e783f3f Mon Sep 17 00:00:00 2001 From: Haochen Gui Date: Wed, 27 Dec 2023 10:30:56 +0800 Subject: [PATCH] rs6000: Call library for block memory compare when optimizing for size gcc/ * config/rs6000/rs6000.md (cmpmemsi): Fail when optimizing for size. gcc/testsuite/ * gcc.target/powerpc/block-cmp-3.c: New. --- gcc/config/rs6000/rs6000.md | 3 +++ gcc/testsuite/gcc.target/powerpc/block-cmp-3.c | 8 ++++++++ 2 files changed, 11 insertions(+) create mode 100644 gcc/testsuite/gcc.target/powerpc/block-cmp-3.c diff --git a/gcc/config/rs6000/rs6000.md b/gcc/config/rs6000/rs6000.md index 58126628ca04..37e427bd37b4 100644 --- a/gcc/config/rs6000/rs6000.md +++ b/gcc/config/rs6000/rs6000.md @@ -10146,6 +10146,9 @@ (use (match_operand:SI 4))])] "TARGET_POPCNTD" { + if (optimize_insn_for_size_p ()) + FAIL; + if (expand_block_compare (operands)) DONE; else diff --git a/gcc/testsuite/gcc.target/powerpc/block-cmp-3.c b/gcc/testsuite/gcc.target/powerpc/block-cmp-3.c new file mode 100644 index 000000000000..c7e853ad5931 --- /dev/null +++ b/gcc/testsuite/gcc.target/powerpc/block-cmp-3.c @@ -0,0 +1,8 @@ +/* { dg-do compile } */ +/* { dg-options "-Os" } */ +/* { dg-final { scan-assembler-times {\mb[l]? memcmp\M} 1 } } */ + +int foo (const char* s1, const char* s2) +{ + return __builtin_memcmp (s1, s2, 4); +} -- 2.47.2