@@ -2096,12 +2096,15 @@ static void tcg_reg_alloc_mov(TCGContext *s, const TCGOpDef *def,
{
TCGRegSet allocated_regs;
TCGTemp *ts, *ots;
- TCGType type;
+ TCGType otype, itype;
tcg_regset_set(allocated_regs, s->reserved_regs);
ots = &s->temps[args[0]];
ts = &s->temps[args[1]];
- type = ots->type;
+
+ /* Note that otype != itype for no-op truncation. */
+ otype = ots->type;
+ itype = ts->type;
/* If the source value is not in a register, and we're going to be
forced to have it in a register in order to perform the copy,
@@ -2109,13 +2112,13 @@ static void tcg_reg_alloc_mov(TCGContext *s, const TCGOpDef *def,
we don't have to reload SOURCE the next time it is used. */
if (((NEED_SYNC_ARG(0) || ots->fixed_reg) && ts->val_type != TEMP_VAL_REG)
|| ts->val_type == TEMP_VAL_MEM) {
- ts->reg = tcg_reg_alloc(s, tcg_target_available_regs[type],
+ ts->reg = tcg_reg_alloc(s, tcg_target_available_regs[itype],
allocated_regs);
if (ts->val_type == TEMP_VAL_MEM) {
- tcg_out_ld(s, type, ts->reg, ts->mem_reg, ts->mem_offset);
+ tcg_out_ld(s, itype, ts->reg, ts->mem_reg, ts->mem_offset);
ts->mem_coherent = 1;
} else if (ts->val_type == TEMP_VAL_CONST) {
- tcg_out_movi(s, type, ts->reg, ts->val);
+ tcg_out_movi(s, itype, ts->reg, ts->val);
}
s->reg_to_temp[ts->reg] = args[1];
ts->val_type = TEMP_VAL_REG;
@@ -2130,7 +2133,7 @@ static void tcg_reg_alloc_mov(TCGContext *s, const TCGOpDef *def,
if (!ots->mem_allocated) {
temp_allocate_frame(s, args[0]);
}
- tcg_out_st(s, type, ts->reg, ots->mem_reg, ots->mem_offset);
+ tcg_out_st(s, otype, ts->reg, ots->mem_reg, ots->mem_offset);
if (IS_DEAD_ARG(1)) {
temp_dead(s, args[1]);
}
@@ -2158,10 +2161,10 @@ static void tcg_reg_alloc_mov(TCGContext *s, const TCGOpDef *def,
/* When allocating a new register, make sure to not spill the
input one. */
tcg_regset_set_reg(allocated_regs, ts->reg);
- ots->reg = tcg_reg_alloc(s, tcg_target_available_regs[type],
+ ots->reg = tcg_reg_alloc(s, tcg_target_available_regs[otype],
allocated_regs);
}
- tcg_out_mov(s, type, ots->reg, ts->reg);
+ tcg_out_mov(s, otype, ots->reg, ts->reg);
}
ots->val_type = TEMP_VAL_REG;
ots->mem_coherent = 0;
Commit af3cbfbe8018ccc16fb3a0048e928f66f0d05e87 hoisted some "common" loads of the temporary type, forgetting that the types could differ during truncating moves. This affects the correctness of the memory offset on big-endian hosts. Signed-off-by: Richard Henderson <rth@twiddle.net> --- tcg/tcg.c | 19 +++++++++++-------- 1 file changed, 11 insertions(+), 8 deletions(-)