According to Intel Software Optimization Manual[1], the Redwood cove microarchitecture supports LD+OP and MOV+OP macro fusions.
The patch enables MOV+OP tune for GNR. [1] https://www.intel.com/content/www/us/en/content-details/814198/intel-64-and-ia-32-architectures-optimization-reference-manual-volume-1.html Bootstrapped and regtested on x86_64-pc-linux-gnu{-m32,}. Ready push to trunk. gcc/ChangeLog: * config/i386/x86-tune.def (X86_TUNE_FUSE_MOV_AND_ALU): Enable for GNR and GNR-D. --- gcc/config/i386/x86-tune.def | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/gcc/config/i386/x86-tune.def b/gcc/config/i386/x86-tune.def index d7e2ad7fd25..3d123da95f0 100644 --- a/gcc/config/i386/x86-tune.def +++ b/gcc/config/i386/x86-tune.def @@ -153,7 +153,8 @@ DEF_TUNE (X86_TUNE_FUSE_ALU_AND_BRANCH, "fuse_alu_and_branch", /* X86_TUNE_FUSE_MOV_AND_ALU: mov and alu in case mov is reg-reg mov and the destination is used by alu. alu must be one of ADD, ADC, AND, XOR, OR, SUB, SBB, INC, DEC, NOT, SAL, SHL, SHR, SAR. */ -DEF_TUNE (X86_TUNE_FUSE_MOV_AND_ALU, "fuse_mov_and_alu", m_ZNVER5) +DEF_TUNE (X86_TUNE_FUSE_MOV_AND_ALU, "fuse_mov_and_alu", + m_ZNVER5 | m_GRANITERAPIDS | m_GRANITERAPIDS_D) /*****************************************************************************/ /* Function prologue, epilogue and function calling sequences. */ -- 2.31.1
