Hi,
This defines TARGET_FLAGS_REGNUM for AArch64 to be CC_REGNUM. Noticed
this turns on the cmpelim pass after reload and in a few examples and a
couple of benchmarks I noticed a number of comparisons getting deleted.
A similar patch for AArch32 is being tested.
Tested cross with aarch64-none-elf on a model with no regressions.
Ok for stage1 ?
regards
Ramana
<DATE> Ramana Radhakrishnan <ramana.radhakrish...@arm.com>
* config/aarch64/aarch64.c (TARGET_FLAGS_REGNUM): Define.
--
Ramana Radhakrishnan
Principal Engineer
ARM Ltd.diff --git a/gcc/config/aarch64/aarch64.c b/gcc/config/aarch64/aarch64.c
index 901ad3de793c2dd6ca3a2458dc6268e56322400a..617f4de494b1c9fa366dcf4a9fc7f22e7d11642a 100644
--- a/gcc/config/aarch64/aarch64.c
+++ b/gcc/config/aarch64/aarch64.c
@@ -8536,6 +8536,9 @@ aarch64_cannot_change_mode_class (enum machine_mode from,
#undef TARGET_FIXED_CONDITION_CODE_REGS
#define TARGET_FIXED_CONDITION_CODE_REGS aarch64_fixed_condition_code_regs
+#undef TARGET_FLAGS_REGNUM
+#define TARGET_FLAGS_REGNUM CC_REGNUM
+
struct gcc_target targetm = TARGET_INITIALIZER;
#include "gt-aarch64.h"
