[llvm] bee9aa7 - [InstCombine] Add test coverage from D124503

[Simon Pilgrim via llvm-commits]

Author: Simon Pilgrim
Date: 2022-05-01T16:09:23+01:00
New Revision: bee9aa78db3f42fc79ff3ee70250cb6d19d5d15a

URL: https://github.com/llvm/llvm-project/commit/bee9aa78db3f42fc79ff3ee70250cb6d19d5d15a
DIFF: https://github.com/llvm/llvm-project/commit/bee9aa78db3f42fc79ff3ee70250cb6d19d5d15a.diff

LOG: [InstCombine] Add test coverage from D124503

Added: 
    

Modified: 
    llvm/test/Transforms/InstCombine/sub-minmax.ll

Removed: 
    


################################################################################
diff  --git a/llvm/test/Transforms/InstCombine/sub-minmax.ll b/llvm/test/Transforms/InstCombine/sub-minmax.ll
index 0d27bf9e42784..8465535fdb2e3 100644
--- a/llvm/test/Transforms/InstCombine/sub-minmax.ll
+++ b/llvm/test/Transforms/InstCombine/sub-minmax.ll
@@ -732,5 +732,102 @@ define i8 @sub_add_umin(i8 %x, i8 %y, i8 %z) {
   ret i8 %s
 }
 
+define i8 @sub_add_umin_commute_umin(i8 %x, i8 %y, i8 %z) {
+; CHECK-LABEL: @sub_add_umin_commute_umin(
+; CHECK-NEXT:    [[A:%.*]] = add i8 [[X:%.*]], [[Y:%.*]]
+; CHECK-NEXT:    [[M:%.*]] = call i8 @llvm.umin.i8(i8 [[Z:%.*]], i8 [[Y]])
+; CHECK-NEXT:    [[S:%.*]] = sub i8 [[A]], [[M]]
+; CHECK-NEXT:    ret i8 [[S]]
+;
+  %a = add i8 %x, %y
+  %m = call i8 @llvm.umin.i8(i8 %z, i8 %y)
+  %s = sub i8 %a, %m
+  ret i8 %s
+}
+
+define i8 @sub_add_umin_commute_add(i8 %x, i8 %y, i8 %z) {
+; CHECK-LABEL: @sub_add_umin_commute_add(
+; CHECK-NEXT:    [[A:%.*]] = add i8 [[Y:%.*]], [[X:%.*]]
+; CHECK-NEXT:    [[M:%.*]] = call i8 @llvm.umin.i8(i8 [[Y]], i8 [[Z:%.*]])
+; CHECK-NEXT:    [[S:%.*]] = sub i8 [[A]], [[M]]
+; CHECK-NEXT:    ret i8 [[S]]
+;
+  %a = add i8 %y, %x
+  %m = call i8 @llvm.umin.i8(i8 %y, i8 %z)
+  %s = sub i8 %a, %m
+  ret i8 %s
+}
+
+define i8 @sub_add_umin_commute_add_umin(i8 %x, i8 %y, i8 %z) {
+; CHECK-LABEL: @sub_add_umin_commute_add_umin(
+; CHECK-NEXT:    [[A:%.*]] = add i8 [[Y:%.*]], [[X:%.*]]
+; CHECK-NEXT:    [[M:%.*]] = call i8 @llvm.umin.i8(i8 [[Z:%.*]], i8 [[Y]])
+; CHECK-NEXT:    [[S:%.*]] = sub i8 [[A]], [[M]]
+; CHECK-NEXT:    ret i8 [[S]]
+;
+  %a = add i8 %y, %x
+  %m = call i8 @llvm.umin.i8(i8 %z, i8 %y)
+  %s = sub i8 %a, %m
+  ret i8 %s
+}
+
+define <2 x i8> @sub_add_umin_vec(<2 x i8> %x, <2 x i8> %y, <2 x i8> %z) {
+; CHECK-LABEL: @sub_add_umin_vec(
+; CHECK-NEXT:    [[A:%.*]] = add <2 x i8> [[X:%.*]], [[Y:%.*]]
+; CHECK-NEXT:    [[M:%.*]] = call <2 x i8> @llvm.umin.v2i8(<2 x i8> [[Y]], <2 x i8> [[Z:%.*]])
+; CHECK-NEXT:    [[S:%.*]] = sub <2 x i8> [[A]], [[M]]
+; CHECK-NEXT:    ret <2 x i8> [[S]]
+;
+  %a = add <2 x i8> %x, %y
+  %m = call <2 x i8> @llvm.umin.v2i8(<2 x i8> %y, <2 x i8> %z)
+  %s = sub <2 x i8> %a, %m
+  ret <2 x i8> %s
+}
+
+; negative test
+
+define i8 @sub_add_umin_mismatch(i8 %x, i8 %y, i8 %z, i8 %t) {
+; CHECK-LABEL: @sub_add_umin_mismatch(
+; CHECK-NEXT:    [[A:%.*]] = add i8 [[X:%.*]], [[Y:%.*]]
+; CHECK-NEXT:    [[M:%.*]] = call i8 @llvm.umin.i8(i8 [[T:%.*]], i8 [[Z:%.*]])
+; CHECK-NEXT:    [[S:%.*]] = sub i8 [[A]], [[M]]
+; CHECK-NEXT:    ret i8 [[S]]
+;
+  %a = add i8 %x, %y
+  %m = call i8 @llvm.umin.i8(i8 %t, i8 %z)
+  %s = sub i8 %a, %m
+  ret i8 %s
+}
+
+define i8 @sub_add_umin_use_a(i8 %x, i8 %y, i8 %z) {
+; CHECK-LABEL: @sub_add_umin_use_a(
+; CHECK-NEXT:    [[A:%.*]] = add i8 [[X:%.*]], [[Y:%.*]]
+; CHECK-NEXT:    [[M:%.*]] = call i8 @llvm.umin.i8(i8 [[Y]], i8 [[Z:%.*]])
+; CHECK-NEXT:    [[S:%.*]] = sub i8 [[A]], [[M]]
+; CHECK-NEXT:    call void @use8(i8 [[A]])
+; CHECK-NEXT:    ret i8 [[S]]
+;
+  %a = add i8 %x, %y
+  %m = call i8 @llvm.umin.i8(i8 %y, i8 %z)
+  %s = sub i8 %a, %m
+  call void @use8(i8 %a)
+  ret i8 %s
+}
+
+define i8 @sub_add_umin_use_m(i8 %x, i8 %y, i8 %z) {
+; CHECK-LABEL: @sub_add_umin_use_m(
+; CHECK-NEXT:    [[A:%.*]] = add i8 [[X:%.*]], [[Y:%.*]]
+; CHECK-NEXT:    [[M:%.*]] = call i8 @llvm.umin.i8(i8 [[Y]], i8 [[Z:%.*]])
+; CHECK-NEXT:    [[S:%.*]] = sub i8 [[A]], [[M]]
+; CHECK-NEXT:    call void @use8(i8 [[M]])
+; CHECK-NEXT:    ret i8 [[S]]
+;
+  %a = add i8 %x, %y
+  %m = call i8 @llvm.umin.i8(i8 %y, i8 %z)
+  %s = sub i8 %a, %m
+  call void @use8(i8 %m)
+  ret i8 %s
+}
+
 declare void @use8(i8)
 declare void @use32(i32 %u)