[DAG] Fold trunc(avg(x,y)) for avgceil/floor u/s nodes if they have sufficient leading zero/sign bits-9

houngkoungting · houngkoungting · commit 32041fbb0b96 · 2025-08-17T00:10:04.000+08:00
diff --git a/llvm/test/CodeGen/AArch64/trunc-avg-fold.ll b/llvm/test/CodeGen/AArch64/trunc-avg-fold.ll
@@ -26,7 +26,7 @@ define <8 x i8> @test_avgceil_s(<8 x i8> %a, <8 x i8> %b) {
   ret <8 x i8> %res
 }
 
-define <8 x i8> @avgfloor_u_from_intrin(<8 x i8> %a, <8 x i8> %b) {
+define <8 x i8> @avgfloor_u_i8_to_i16(<8 x i8> %a, <8 x i8> %b) {
 ; CHECK-LABEL: avgfloor_u_from_intrin:
 ; CHECK:       // %bb.0:
 ; CHECK-NEXT:    uhadd v0.8b, v0.8b, v1.8b

Original file line number	Diff line number	Diff line change
`@@ -26,7 +26,7 @@ define <8 x i8> @test_avgceil_s(<8 x i8> %a, <8 x i8> %b) {`
`26`	`26`	`ret <8 x i8> %res`
`27`	`27`	`}`
`28`	`28`
`29`		`-define <8 x i8> @avgfloor_u_from_intrin(<8 x i8> %a, <8 x i8> %b) {`
	`29`	`+define <8 x i8> @avgfloor_u_i8_to_i16(<8 x i8> %a, <8 x i8> %b) {`
`30`	`30`	`; CHECK-LABEL: avgfloor_u_from_intrin:`
`31`	`31`	`; CHECK: // %bb.0:`
`32`	`32`	`; CHECK-NEXT: uhadd v0.8b, v0.8b, v1.8b`