From 011e15bea3456cf429a801e309c65bef14fa22ad Mon Sep 17 00:00:00 2001
From: Sanjay Patel <spatel@rotateright.com>
Date: Mon, 3 Aug 2020 16:51:05 -0400
Subject: [PATCH] [InstSimplify] add tests for min/max with constants; NFC

---
 .../InstSimplify/maxmin_intrinsics.ll         | 206 ++++++++++++++++++
 1 file changed, 206 insertions(+)

diff --git a/llvm/test/Transforms/InstSimplify/maxmin_intrinsics.ll b/llvm/test/Transforms/InstSimplify/maxmin_intrinsics.ll
index 7a31a4dcb9a3..3aa19e91e0e3 100644
--- a/llvm/test/Transforms/InstSimplify/maxmin_intrinsics.ll
+++ b/llvm/test/Transforms/InstSimplify/maxmin_intrinsics.ll
@@ -572,6 +572,8 @@ define i8 @smin_smax_commute3(i8 %x, i8 %y) {
   ret i8 %m2
 }
 
+; Negative test - mismatched intrinsics.
+
 define i8 @smax_umin(i8 %x, i8 %y) {
 ; CHECK-LABEL: @smax_umin(
 ; CHECK-NEXT:    [[M:%.*]] = call i8 @llvm.smax.i8(i8 [[Y:%.*]], i8 [[X:%.*]])
@@ -583,6 +585,8 @@ define i8 @smax_umin(i8 %x, i8 %y) {
   ret i8 %m2
 }
 
+; Negative test - mismatched intrinsics.
+
 define i8 @smax_umax(i8 %x, i8 %y) {
 ; CHECK-LABEL: @smax_umax(
 ; CHECK-NEXT:    [[M:%.*]] = call i8 @llvm.smax.i8(i8 [[Y:%.*]], i8 [[X:%.*]])
@@ -594,6 +598,8 @@ define i8 @smax_umax(i8 %x, i8 %y) {
   ret i8 %m2
 }
 
+; Negative test - mismatched intrinsics.
+
 define i8 @umax_smin(i8 %x, i8 %y) {
 ; CHECK-LABEL: @umax_smin(
 ; CHECK-NEXT:    [[M:%.*]] = call i8 @llvm.umax.i8(i8 [[Y:%.*]], i8 [[X:%.*]])
@@ -605,6 +611,8 @@ define i8 @umax_smin(i8 %x, i8 %y) {
   ret i8 %m2
 }
 
+; Negative test - mismatched intrinsics.
+
 define i8 @umin_smin(i8 %x, i8 %y) {
 ; CHECK-LABEL: @umin_smin(
 ; CHECK-NEXT:    [[M:%.*]] = call i8 @llvm.umin.i8(i8 [[Y:%.*]], i8 [[X:%.*]])
@@ -615,3 +623,201 @@ define i8 @umin_smin(i8 %x, i8 %y) {
   %m2 = call i8 @llvm.smin.i8(i8 %m, i8 %x)
   ret i8 %m2
 }
+
+define i8 @umax_umax_constants(i8 %x) {
+; CHECK-LABEL: @umax_umax_constants(
+; CHECK-NEXT:    [[M:%.*]] = call i8 @llvm.umax.i8(i8 [[X:%.*]], i8 9)
+; CHECK-NEXT:    [[M2:%.*]] = call i8 @llvm.umax.i8(i8 7, i8 [[M]])
+; CHECK-NEXT:    ret i8 [[M2]]
+;
+  %m = call i8 @llvm.umax.i8(i8 %x, i8 9)
+  %m2 = call i8 @llvm.umax.i8(i8 7, i8 %m)
+  ret i8 %m2
+}
+
+define i8 @umax_umax_constants_commute1(i8 %x) {
+; CHECK-LABEL: @umax_umax_constants_commute1(
+; CHECK-NEXT:    [[M:%.*]] = call i8 @llvm.umax.i8(i8 -128, i8 [[X:%.*]])
+; CHECK-NEXT:    [[M2:%.*]] = call i8 @llvm.umax.i8(i8 7, i8 [[M]])
+; CHECK-NEXT:    ret i8 [[M2]]
+;
+  %m = call i8 @llvm.umax.i8(i8 128, i8 %x)
+  %m2 = call i8 @llvm.umax.i8(i8 7, i8 %m)
+  ret i8 %m2
+}
+
+define i8 @umax_umax_constants_commute2(i8 %x) {
+; CHECK-LABEL: @umax_umax_constants_commute2(
+; CHECK-NEXT:    [[M:%.*]] = call i8 @llvm.umax.i8(i8 [[X:%.*]], i8 -56)
+; CHECK-NEXT:    [[M2:%.*]] = call i8 @llvm.umax.i8(i8 [[M]], i8 127)
+; CHECK-NEXT:    ret i8 [[M2]]
+;
+  %m = call i8 @llvm.umax.i8(i8 %x, i8 200)
+  %m2 = call i8 @llvm.umax.i8(i8 %m, i8 127)
+  ret i8 %m2
+}
+
+define <2 x i8> @umax_umax_constants_commute3(<2 x i8> %x) {
+; CHECK-LABEL: @umax_umax_constants_commute3(
+; CHECK-NEXT:    [[M:%.*]] = call <2 x i8> @llvm.umax.v2i8(<2 x i8> <i8 -2, i8 -2>, <2 x i8> [[X:%.*]])
+; CHECK-NEXT:    [[M2:%.*]] = call <2 x i8> @llvm.umax.v2i8(<2 x i8> [[M]], <2 x i8> <i8 -128, i8 -128>)
+; CHECK-NEXT:    ret <2 x i8> [[M2]]
+;
+  %m = call <2 x i8> @llvm.umax.v2i8(<2 x i8> <i8 254, i8 254>, <2 x i8> %x)
+  %m2 = call <2 x i8> @llvm.umax.v2i8(<2 x i8> %m, <2 x i8> <i8 128, i8 128>)
+  ret <2 x i8> %m2
+}
+
+define i8 @umin_umin_constants(i8 %x) {
+; CHECK-LABEL: @umin_umin_constants(
+; CHECK-NEXT:    [[M:%.*]] = call i8 @llvm.umin.i8(i8 [[X:%.*]], i8 7)
+; CHECK-NEXT:    [[M2:%.*]] = call i8 @llvm.umin.i8(i8 9, i8 [[M]])
+; CHECK-NEXT:    ret i8 [[M2]]
+;
+  %m = call i8 @llvm.umin.i8(i8 %x, i8 7)
+  %m2 = call i8 @llvm.umin.i8(i8 9, i8 %m)
+  ret i8 %m2
+}
+
+define i8 @umin_umin_constants_commute1(i8 %x) {
+; CHECK-LABEL: @umin_umin_constants_commute1(
+; CHECK-NEXT:    [[M:%.*]] = call i8 @llvm.umin.i8(i8 7, i8 [[X:%.*]])
+; CHECK-NEXT:    [[M2:%.*]] = call i8 @llvm.umin.i8(i8 -128, i8 [[M]])
+; CHECK-NEXT:    ret i8 [[M2]]
+;
+  %m = call i8 @llvm.umin.i8(i8 7, i8 %x)
+  %m2 = call i8 @llvm.umin.i8(i8 128, i8 %m)
+  ret i8 %m2
+}
+
+define <2 x i8> @umin_umin_constants_commute2(<2 x i8> %x) {
+; CHECK-LABEL: @umin_umin_constants_commute2(
+; CHECK-NEXT:    [[M:%.*]] = call <2 x i8> @llvm.umin.v2i8(<2 x i8> [[X:%.*]], <2 x i8> <i8 127, i8 127>)
+; CHECK-NEXT:    [[M2:%.*]] = call <2 x i8> @llvm.umin.v2i8(<2 x i8> [[M]], <2 x i8> <i8 -56, i8 undef>)
+; CHECK-NEXT:    ret <2 x i8> [[M2]]
+;
+  %m = call <2 x i8> @llvm.umin.v2i8(<2 x i8> %x, <2 x i8> <i8 127, i8 127>)
+  %m2 = call <2 x i8> @llvm.umin.v2i8(<2 x i8> %m, <2 x i8> <i8 200, i8 undef>)
+  ret <2 x i8> %m2
+}
+
+define i8 @umin_umin_constants_commute3(i8 %x) {
+; CHECK-LABEL: @umin_umin_constants_commute3(
+; CHECK-NEXT:    [[M:%.*]] = call i8 @llvm.umin.i8(i8 -128, i8 [[X:%.*]])
+; CHECK-NEXT:    [[M2:%.*]] = call i8 @llvm.umin.i8(i8 [[M]], i8 -2)
+; CHECK-NEXT:    ret i8 [[M2]]
+;
+  %m = call i8 @llvm.umin.i8(i8 128, i8 %x)
+  %m2 = call i8 @llvm.umin.i8(i8 %m, i8 254)
+  ret i8 %m2
+}
+
+define i8 @smax_smax_constants(i8 %x) {
+; CHECK-LABEL: @smax_smax_constants(
+; CHECK-NEXT:    [[M:%.*]] = call i8 @llvm.smax.i8(i8 [[X:%.*]], i8 9)
+; CHECK-NEXT:    [[M2:%.*]] = call i8 @llvm.smax.i8(i8 7, i8 [[M]])
+; CHECK-NEXT:    ret i8 [[M2]]
+;
+  %m = call i8 @llvm.smax.i8(i8 %x, i8 9)
+  %m2 = call i8 @llvm.smax.i8(i8 7, i8 %m)
+  ret i8 %m2
+}
+
+define <2 x i8> @smax_smax_constants_commute1(<2 x i8> %x) {
+; CHECK-LABEL: @smax_smax_constants_commute1(
+; CHECK-NEXT:    [[M:%.*]] = call <2 x i8> @llvm.smax.v2i8(<2 x i8> <i8 7, i8 7>, <2 x i8> [[X:%.*]])
+; CHECK-NEXT:    [[M2:%.*]] = call <2 x i8> @llvm.smax.v2i8(<2 x i8> <i8 -127, i8 -127>, <2 x i8> [[M]])
+; CHECK-NEXT:    ret <2 x i8> [[M2]]
+;
+  %m = call <2 x i8> @llvm.smax.v2i8(<2 x i8> <i8 7, i8 7>, <2 x i8> %x)
+  %m2 = call <2 x i8> @llvm.smax.v2i8(<2 x i8> <i8 -127, i8 -127>, <2 x i8> %m)
+  ret <2 x i8> %m2
+}
+
+define i8 @smax_smax_constants_commute2(i8 %x) {
+; CHECK-LABEL: @smax_smax_constants_commute2(
+; CHECK-NEXT:    [[M:%.*]] = call i8 @llvm.smax.i8(i8 [[X:%.*]], i8 0)
+; CHECK-NEXT:    [[M2:%.*]] = call i8 @llvm.smax.i8(i8 [[M]], i8 -1)
+; CHECK-NEXT:    ret i8 [[M2]]
+;
+  %m = call i8 @llvm.smax.i8(i8 %x, i8 0)
+  %m2 = call i8 @llvm.smax.i8(i8 %m, i8 -1)
+  ret i8 %m2
+}
+
+define i8 @smax_smax_constants_commute3(i8 %x) {
+; CHECK-LABEL: @smax_smax_constants_commute3(
+; CHECK-NEXT:    [[M:%.*]] = call i8 @llvm.smax.i8(i8 -1, i8 [[X:%.*]])
+; CHECK-NEXT:    [[M2:%.*]] = call i8 @llvm.smax.i8(i8 [[M]], i8 -127)
+; CHECK-NEXT:    ret i8 [[M2]]
+;
+  %m = call i8 @llvm.smax.i8(i8 -1, i8 %x)
+  %m2 = call i8 @llvm.smax.i8(i8 %m, i8 -127)
+  ret i8 %m2
+}
+
+define <2 x i8> @smin_smin_constants(<2 x i8> %x) {
+; CHECK-LABEL: @smin_smin_constants(
+; CHECK-NEXT:    [[M:%.*]] = call <2 x i8> @llvm.smin.v2i8(<2 x i8> [[X:%.*]], <2 x i8> <i8 7, i8 7>)
+; CHECK-NEXT:    [[M2:%.*]] = call <2 x i8> @llvm.smin.v2i8(<2 x i8> <i8 undef, i8 9>, <2 x i8> [[M]])
+; CHECK-NEXT:    ret <2 x i8> [[M2]]
+;
+  %m = call <2 x i8> @llvm.smin.v2i8(<2 x i8> %x, <2 x i8> <i8 7, i8 7>)
+  %m2 = call <2 x i8> @llvm.smin.v2i8(<2 x i8> <i8 undef, i8 9>, <2 x i8> %m)
+  ret <2 x i8> %m2
+}
+
+define i8 @smin_smin_constants_commute1(i8 %x) {
+; CHECK-LABEL: @smin_smin_constants_commute1(
+; CHECK-NEXT:    [[M:%.*]] = call i8 @llvm.smin.i8(i8 -127, i8 [[X:%.*]])
+; CHECK-NEXT:    [[M2:%.*]] = call i8 @llvm.smin.i8(i8 7, i8 [[M]])
+; CHECK-NEXT:    ret i8 [[M2]]
+;
+  %m = call i8 @llvm.smin.i8(i8 -127, i8 %x)
+  %m2 = call i8 @llvm.smin.i8(i8 7, i8 %m)
+  ret i8 %m2
+}
+
+define i8 @smin_smin_constants_commute2(i8 %x) {
+; CHECK-LABEL: @smin_smin_constants_commute2(
+; CHECK-NEXT:    [[M:%.*]] = call i8 @llvm.smin.i8(i8 [[X:%.*]], i8 -1)
+; CHECK-NEXT:    [[M2:%.*]] = call i8 @llvm.smin.i8(i8 [[M]], i8 0)
+; CHECK-NEXT:    ret i8 [[M2]]
+;
+  %m = call i8 @llvm.smin.i8(i8 %x, i8 -1)
+  %m2 = call i8 @llvm.smin.i8(i8 %m, i8 0)
+  ret i8 %m2
+}
+
+define i8 @smin_smin_constants_commute3(i8 %x) {
+; CHECK-LABEL: @smin_smin_constants_commute3(
+; CHECK-NEXT:    [[M:%.*]] = call i8 @llvm.smin.i8(i8 -127, i8 [[X:%.*]])
+; CHECK-NEXT:    [[M2:%.*]] = call i8 @llvm.smin.i8(i8 [[M]], i8 -1)
+; CHECK-NEXT:    ret i8 [[M2]]
+;
+  %m = call i8 @llvm.smin.i8(i8 -127, i8 %x)
+  %m2 = call i8 @llvm.smin.i8(i8 %m, i8 -1)
+  ret i8 %m2
+}
+
+define <2 x i8> @umin_umin_constants_partial_undef(<2 x i8> %x) {
+; CHECK-LABEL: @umin_umin_constants_partial_undef(
+; CHECK-NEXT:    [[M:%.*]] = call <2 x i8> @llvm.umin.v2i8(<2 x i8> [[X:%.*]], <2 x i8> <i8 7, i8 undef>)
+; CHECK-NEXT:    [[M2:%.*]] = call <2 x i8> @llvm.umin.v2i8(<2 x i8> <i8 9, i8 9>, <2 x i8> [[M]])
+; CHECK-NEXT:    ret <2 x i8> [[M2]]
+;
+  %m = call <2 x i8> @llvm.umin.v2i8(<2 x i8> %x, <2 x i8> <i8 7, i8 undef> )
+  %m2 = call <2 x i8> @llvm.umin.v2i8(<2 x i8> <i8 9, i8 9>, <2 x i8> %m)
+  ret <2 x i8> %m2
+}
+
+define <2 x i8> @smax_smax_constants_partial_undef(<2 x i8> %x) {
+; CHECK-LABEL: @smax_smax_constants_partial_undef(
+; CHECK-NEXT:    [[M:%.*]] = call <2 x i8> @llvm.smax.v2i8(<2 x i8> [[X:%.*]], <2 x i8> <i8 undef, i8 10>)
+; CHECK-NEXT:    [[M2:%.*]] = call <2 x i8> @llvm.smax.v2i8(<2 x i8> <i8 9, i8 9>, <2 x i8> [[M]])
+; CHECK-NEXT:    ret <2 x i8> [[M2]]
+;
+  %m = call <2 x i8> @llvm.smax.v2i8(<2 x i8> %x, <2 x i8> <i8 undef, i8 10> )
+  %m2 = call <2 x i8> @llvm.smax.v2i8(<2 x i8> <i8 9, i8 9>, <2 x i8> %m)
+  ret <2 x i8> %m2
+}