@@ -186,22 +186,25 @@ static const char * const tcg_target_reg_names[TCG_TARGET_NB_REGS] = {
};
#endif
+/* Since R6 is a potential argument register, choose it last of the
+ call-saved registers. Likewise prefer the call-clobbered registers
+ in reverse order to maximize the chance of avoiding the arguments. */
static const int tcg_target_reg_alloc_order[] = {
- TCG_REG_R6,
- TCG_REG_R7,
- TCG_REG_R8,
- TCG_REG_R9,
- TCG_REG_R10,
- TCG_REG_R11,
- TCG_REG_R12,
TCG_REG_R13,
+ TCG_REG_R12,
+ TCG_REG_R11,
+ TCG_REG_R10,
+ TCG_REG_R9,
+ TCG_REG_R8,
+ TCG_REG_R7,
+ TCG_REG_R6,
TCG_REG_R14,
TCG_REG_R0,
TCG_REG_R1,
- TCG_REG_R2,
- TCG_REG_R3,
- TCG_REG_R4,
TCG_REG_R5,
+ TCG_REG_R4,
+ TCG_REG_R3,
+ TCG_REG_R2,
};
static const int tcg_target_call_iarg_regs[] = {
Try to avoid conflicting with the outgoing function call arguments. Signed-off-by: Richard Henderson <rth@twiddle.net> --- tcg/s390/tcg-target.c | 23 +++++++++++++---------- 1 files changed, 13 insertions(+), 10 deletions(-)