[InstCombine] add tests for min/max intrinsics with constant ops; NFC

llvm · Feb 14, 2022 · 5e90f38 · 5e90f38
1 parent 857ec0d
commit 5e90f38
Showing 1 changed file with 57 additions and 0 deletions.
diff --git a/llvm/test/Transforms/InstCombine/minmax-intrinsics.ll b/llvm/test/Transforms/InstCombine/minmax-intrinsics.ll
@@ -2141,3 +2141,60 @@ define i8 @smax_offset_simplify(i8 %x) {
   %m = call i8 @llvm.smax.i8(i8 %1, i8 -124)
   ret i8 %m
 }
+
+define <3 x i8> @smax_smax_reassoc_constants(<3 x i8> %x) {
+; CHECK-LABEL: @smax_smax_reassoc_constants(
+; CHECK-NEXT:    [[M1:%.*]] = call <3 x i8> @llvm.smax.v3i8(<3 x i8> [[X:%.*]], <3 x i8> <i8 42, i8 43, i8 44>)
+; CHECK-NEXT:    [[M2:%.*]] = call <3 x i8> @llvm.smax.v3i8(<3 x i8> [[M1]], <3 x i8> <i8 43, i8 -43, i8 0>)
+; CHECK-NEXT:    ret <3 x i8> [[M2]]
+;
+  %m1 = call <3 x i8> @llvm.smax.v3i8(<3 x i8> %x, <3 x i8> <i8 42, i8 43, i8 44>)
+  %m2 = call <3 x i8> @llvm.smax.v3i8(<3 x i8> %m1, <3 x i8> <i8 43, i8 -43, i8 0>)
+  ret <3 x i8> %m2
+}
+
+define i8 @smin_smin_reassoc_constants(i8 %x) {
+; CHECK-LABEL: @smin_smin_reassoc_constants(
+; CHECK-NEXT:    [[M1:%.*]] = call i8 @llvm.smin.i8(i8 [[X:%.*]], i8 97)
+; CHECK-NEXT:    [[M2:%.*]] = call i8 @llvm.smin.i8(i8 [[M1]], i8 -3)
+; CHECK-NEXT:    ret i8 [[M2]]
+;
+  %m1 = call i8 @llvm.smin.i8(i8 %x, i8 97)
+  %m2 = call i8 @llvm.smin.i8(i8 -3, i8 %m1)
+  ret i8 %m2
+}
+
+define <3 x i8> @umax_umax_reassoc_constants(<3 x i8> %x) {
+; CHECK-LABEL: @umax_umax_reassoc_constants(
+; CHECK-NEXT:    [[M1:%.*]] = call <3 x i8> @llvm.umax.v3i8(<3 x i8> [[X:%.*]], <3 x i8> <i8 42, i8 43, i8 44>)
+; CHECK-NEXT:    [[M2:%.*]] = call <3 x i8> @llvm.umax.v3i8(<3 x i8> [[M1]], <3 x i8> <i8 43, i8 -113, i8 poison>)
+; CHECK-NEXT:    ret <3 x i8> [[M2]]
+;
+  %m1 = call <3 x i8> @llvm.umax.v3i8(<3 x i8> %x, <3 x i8> <i8 42, i8 43, i8 44>)
+  %m2 = call <3 x i8> @llvm.umax.v3i8(<3 x i8> %m1, <3 x i8> <i8 43, i8 143, i8 poison>)
+  ret <3 x i8> %m2
+}
+
+define i8 @umin_umin_reassoc_constants(i8 %x) {
+; CHECK-LABEL: @umin_umin_reassoc_constants(
+; CHECK-NEXT:    [[M1:%.*]] = call i8 @llvm.umin.i8(i8 [[X:%.*]], i8 -116)
+; CHECK-NEXT:    call void @use(i8 [[M1]])
+; CHECK-NEXT:    [[M2:%.*]] = call i8 @llvm.umin.i8(i8 [[M1]], i8 42)
+; CHECK-NEXT:    ret i8 [[M2]]
+;
+  %m1 = call i8 @llvm.umin.i8(i8 140, i8 %x)
+  call void @use(i8 %m1)
+  %m2 = call i8 @llvm.umin.i8(i8 %m1, i8 42)
+  ret i8 %m2
+}
+
+define i8 @smin_smax_reassoc_constants(i8 %x) {
+; CHECK-LABEL: @smin_smax_reassoc_constants(
+; CHECK-NEXT:    [[M1:%.*]] = call i8 @llvm.smin.i8(i8 [[X:%.*]], i8 97)
+; CHECK-NEXT:    [[M2:%.*]] = call i8 @llvm.smax.i8(i8 [[M1]], i8 -3)
+; CHECK-NEXT:    ret i8 [[M2]]
+;
+  %m1 = call i8 @llvm.smin.i8(i8 %x, i8 97)
+  %m2 = call i8 @llvm.smax.i8(i8 %m1, i8 -3)
+  ret i8 %m2
+}