gcc/ 2016-12-12 Claudiu Zissulescu <claz...@synopsys.com> * config/arc/arc.c (arc_conditional_register_usage): Allow r30 to be used by the reg-alloc. --- gcc/config/arc/arc.c | 9 ++++++++- gcc/config/arc/arc.h | 3 ++- 2 files changed, 10 insertions(+), 2 deletions(-)
diff --git a/gcc/config/arc/arc.c b/gcc/config/arc/arc.c index fd4bf2c..ff86f6c 100644 --- a/gcc/config/arc/arc.c +++ b/gcc/config/arc/arc.c @@ -1551,7 +1551,14 @@ arc_conditional_register_usage (void) /* For ARCv2 the core register set is changed. */ strcpy (rname29, "ilink"); strcpy (rname30, "r30"); - fixed_regs[30] = call_used_regs[30] = 1; + call_used_regs[30] = 1; + fixed_regs[30] = 0; + + arc_regno_reg_class[30] = WRITABLE_CORE_REGS; + SET_HARD_REG_BIT (reg_class_contents[WRITABLE_CORE_REGS], 30); + SET_HARD_REG_BIT (reg_class_contents[CHEAP_CORE_REGS], 30); + SET_HARD_REG_BIT (reg_class_contents[GENERAL_REGS], 30); + SET_HARD_REG_BIT (reg_class_contents[MPY_WRITABLE_CORE_REGS], 30); } if (TARGET_MUL64_SET) diff --git a/gcc/config/arc/arc.h b/gcc/config/arc/arc.h index 0a4c745..fbc1195 100644 --- a/gcc/config/arc/arc.h +++ b/gcc/config/arc/arc.h @@ -641,7 +641,8 @@ extern enum reg_class arc_regno_reg_class[]; ((REGNO) < 29 || ((REGNO) == ARG_POINTER_REGNUM) || ((REGNO) == 63) \ || ((unsigned) reg_renumber[REGNO] < 29) \ || ((unsigned) (REGNO) == (unsigned) arc_tp_regno) \ - || (fixed_regs[REGNO] == 0 && IN_RANGE (REGNO, 32, 59))) + || (fixed_regs[REGNO] == 0 && IN_RANGE (REGNO, 32, 59)) \ + || ((REGNO) == 30 && fixed_regs[REGNO] == 0)) #define REGNO_OK_FOR_INDEX_P(REGNO) REGNO_OK_FOR_BASE_P(REGNO) -- 1.9.1