diff mbox series

[PULL,v3,27/38] tcg: Optimize past conditional branches

Message ID 20231023181329.171490-28-richard.henderson@linaro.org
State Accepted
Commit d97f8f394184403beb655f5f077bef8ef83ffa3a
Headers show
Series [PULL,v3,01/38] tcg/ppc: Untabify tcg-target.c.inc | expand

Commit Message

Richard Henderson Oct. 23, 2023, 6:13 p.m. UTC 
We already register allocate through extended basic blocks,
optimize through extended basic blocks as well.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 tcg/optimize.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)
diff mbox series

Patch

diff --git a/tcg/optimize.c b/tcg/optimize.c
index 3013eb04e6..2db5177c32 100644
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -688,12 +688,14 @@  static void finish_folding(OptContext *ctx, TCGOp *op)
     int i, nb_oargs;
 
     /*
-     * For an opcode that ends a BB, reset all temp data.
-     * We do no cross-BB optimization.
+     * We only optimize extended basic blocks.  If the opcode ends a BB
+     * and is not a conditional branch, reset all temp data.
      */
     if (def->flags & TCG_OPF_BB_END) {
-        memset(&ctx->temps_used, 0, sizeof(ctx->temps_used));
         ctx->prev_mb = NULL;
+        if (!(def->flags & TCG_OPF_COND_BRANCH)) {
+            memset(&ctx->temps_used, 0, sizeof(ctx->temps_used));
+        }
         return;
     }