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[PATCH 3/7] [ARC] Allow r30 to be used by the reg-alloc.
- From: Claudiu Zissulescu <Claudiu dot Zissulescu at synopsys dot com>
- To: <gcc-patches at gcc dot gnu dot org>
- Cc: <Claudiu dot Zissulescu at synopsys dot com>, <Francois dot Bedard at synopsys dot com>, <andrew dot burgess at embecosm dot com>
- Date: Fri, 19 May 2017 12:30:58 +0200
- Subject: [PATCH 3/7] [ARC] Allow r30 to be used by the reg-alloc.
- Authentication-results: sourceware.org; auth=none
- References: <1495189862-20533-1-git-send-email-claziss@synopsys.com>
gcc/
2016-12-12 Claudiu Zissulescu <claziss@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