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[Qemu-devel] [PATCH v3 03/26] tcg: add temp_sync()
From: |
Aurelien Jarno |
Subject: |
[Qemu-devel] [PATCH v3 03/26] tcg: add temp_sync() |
Date: |
Fri, 19 Oct 2012 23:38:52 +0200 |
Add a new function temp_sync() to synchronize the canonical location
of a temp with the value in the corresponding register, but without
freeing the associated register. Rewrite temp_save() to call
temp_sync() followed by temp_dead().
Reviewed-by: Richard Henderson <address@hidden>
Signed-off-by: Aurelien Jarno <address@hidden>
---
tcg/tcg.c | 34 +++++++++++++++++++---------------
1 file changed, 19 insertions(+), 15 deletions(-)
diff --git a/tcg/tcg.c b/tcg/tcg.c
index 7141ebb..fabf3cf 100644
--- a/tcg/tcg.c
+++ b/tcg/tcg.c
@@ -1593,31 +1593,27 @@ static inline void temp_dead(TCGContext *s, int temp)
}
}
-/* save a temporary to memory. 'allocated_regs' is used in case a
+/* sync a temporary to memory. 'allocated_regs' is used in case a
temporary registers needs to be allocated to store a constant. */
-static void temp_save(TCGContext *s, int temp, TCGRegSet allocated_regs)
+static inline void temp_sync(TCGContext *s, int temp, TCGRegSet allocated_regs)
{
TCGTemp *ts;
- int reg;
ts = &s->temps[temp];
if (!ts->fixed_reg) {
switch(ts->val_type) {
+ case TEMP_VAL_CONST:
+ ts->reg = tcg_reg_alloc(s, tcg_target_available_regs[ts->type],
+ allocated_regs);
+ ts->val_type = TEMP_VAL_REG;
+ s->reg_to_temp[ts->reg] = temp;
+ ts->mem_coherent = 0;
+ tcg_out_movi(s, ts->type, ts->reg, ts->val);
+ /* fallthrough*/
case TEMP_VAL_REG:
- tcg_reg_free(s, ts->reg);
+ tcg_reg_sync(s, ts->reg);
break;
case TEMP_VAL_DEAD:
- ts->val_type = TEMP_VAL_MEM;
- break;
- case TEMP_VAL_CONST:
- reg = tcg_reg_alloc(s, tcg_target_available_regs[ts->type],
- allocated_regs);
- if (!ts->mem_allocated)
- temp_allocate_frame(s, temp);
- tcg_out_movi(s, ts->type, reg, ts->val);
- tcg_out_st(s, ts->type, reg, ts->mem_reg, ts->mem_offset);
- ts->val_type = TEMP_VAL_MEM;
- break;
case TEMP_VAL_MEM:
break;
default:
@@ -1626,6 +1622,14 @@ static void temp_save(TCGContext *s, int temp, TCGRegSet
allocated_regs)
}
}
+/* save a temporary to memory. 'allocated_regs' is used in case a
+ temporary registers needs to be allocated to store a constant. */
+static inline void temp_save(TCGContext *s, int temp, TCGRegSet allocated_regs)
+{
+ temp_sync(s, temp, allocated_regs);
+ temp_dead(s, temp);
+}
+
/* save globals to their canonical location and assume they can be
modified be the following code. 'allocated_regs' is used in case a
temporary registers needs to be allocated to store a constant. */
--
1.7.10.4
- [Qemu-devel] [PATCH v3 21/26] target-ppc: rename helper flags, (continued)
- [Qemu-devel] [PATCH v3 21/26] target-ppc: rename helper flags, Aurelien Jarno, 2012/10/19
- [Qemu-devel] [PATCH v3 06/26] tcg: improve tcg_reg_alloc_movi(), Aurelien Jarno, 2012/10/19
- [Qemu-devel] [PATCH v3 15/26] target-alpha: rename helper flags, Aurelien Jarno, 2012/10/19
- [Qemu-devel] [PATCH v3 24/26] target-sparc: rename helper flags, Aurelien Jarno, 2012/10/19
- [Qemu-devel] [PATCH 07/26] tcg: rewrite tcg_reg_alloc_mov(), Aurelien Jarno, 2012/10/19
- [Qemu-devel] [PATCH v3 20/26] target-mips: rename helper flags, Aurelien Jarno, 2012/10/19
- [Qemu-devel] [PATCH v3 26/26] tcg: remove compatiblity call flags, Aurelien Jarno, 2012/10/19
- [Qemu-devel] [PATCH v3 19/26] target-microblaze: rename helper flags, Aurelien Jarno, 2012/10/19
- [Qemu-devel] [PATCH v3 14/26] tcg: rework TCG helper flags, Aurelien Jarno, 2012/10/19
- [Qemu-devel] [PATCH v3 04/26] tcg: sync output arguments on liveness request, Aurelien Jarno, 2012/10/19
- [Qemu-devel] [PATCH v3 03/26] tcg: add temp_sync(),
Aurelien Jarno <=
- [Qemu-devel] [PATCH v3 08/26] tcg: always mark dead input arguments as dead, Aurelien Jarno, 2012/10/19
- [Qemu-devel] [PATCH v3 12/26] tcg: forbid ld/st function to modify globals, Aurelien Jarno, 2012/10/19
- [Qemu-devel] [PATCH v3 13/26] tcg: synchronize globals for ops with side effects, Aurelien Jarno, 2012/10/19
- [Qemu-devel] [PATCH v3 10/26] tcg: don't explicitly save globals and temps, Aurelien Jarno, 2012/10/19
- [Qemu-devel] [PATCH v3 16/26] target-arm: rename helper flags, Aurelien Jarno, 2012/10/19
- [Qemu-devel] [PATCH v3 22/26] target-s390x: rename helper flags, Aurelien Jarno, 2012/10/19
- Re: [Qemu-devel] [PATCH v3 00/26] tcg: rework liveness analysis and register allocator, Richard Henderson, 2012/10/21