With rt != r0 on loads, we use rt for scratch. If we need an index
register different from base, we can't use rt, but r0 is usable.
Signed-off-by: Richard Henderson <r...@twiddle.net>
---
This ought to fix the problem that Greg reported.
That we need to use --enable-debug-tcg to see the assert, and that I
didn't previously do testing with that is disappointing. I'm thinking
that we ought to do something like gcc wrt --enable-checking=release
vs development, so that we can't do normal development withing these
asserts enabled. More on that later...
r~
---
tcg/ppc/tcg-target.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/tcg/ppc/tcg-target.c b/tcg/ppc/tcg-target.c
index c83fd9f..dd84e76 100644
--- a/tcg/ppc/tcg-target.c
+++ b/tcg/ppc/tcg-target.c
@@ -805,7 +805,10 @@ static void tcg_out_mem_long(TCGContext *s, int opi, int
opx, TCGReg rt,
/* For unaligned, or very large offsets, use the indexed form. */
if (offset & align || offset != (int32_t)offset) {
- tcg_debug_assert(rs != base && (!is_store || rs != rt));
+ if (rs == base) {
+ rs = TCG_REG_R0;
+ }
+ tcg_debug_assert(!is_store || rs != rt);
tcg_out_movi(s, TCG_TYPE_PTR, rs, orig);
tcg_out32(s, opx | TAB(rt, base, rs));
return;
--
1.9.3
