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[PULL,v2,52/60] tcg/optimize: Use fold_xx_to_i for rem

Message ID 20211029043329.1518029-53-richard.henderson@linaro.org
State New
Headers show
Series [PULL,v2,01/60] qemu/int128: Add int128_{not,xor} | expand

Commit Message

Richard Henderson Oct. 29, 2021, 4:33 a.m. UTC 
Recognize the constant function for remainder.

Suggested-by: Luis Pires <luis.pires@eldorado.org.br>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 tcg/optimize.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)
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Patch

diff --git a/tcg/optimize.c b/tcg/optimize.c
index f8b0709157..7ac63c9231 100644
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -1624,7 +1624,11 @@  static bool fold_qemu_st(OptContext *ctx, TCGOp *op)
 
 static bool fold_remainder(OptContext *ctx, TCGOp *op)
 {
-    return fold_const2(ctx, op);
+    if (fold_const2(ctx, op) ||
+        fold_xx_to_i(ctx, op, 0)) {
+        return true;
+    }
+    return false;
 }
 
 static bool fold_setcond(OptContext *ctx, TCGOp *op)