[llvm] 4b2fd11 - [InstCombine] add test for umax/umin intrinsic demanded bits; NFC

[Sanjay Patel via llvm-commits]

Author: Sanjay Patel
Date: 2021-08-12T12:37:44-04:00
New Revision: 4b2fd1149d99b5a423a167dd539cd653dea1d0d4

URL: https://github.com/llvm/llvm-project/commit/4b2fd1149d99b5a423a167dd539cd653dea1d0d4
DIFF: https://github.com/llvm/llvm-project/commit/4b2fd1149d99b5a423a167dd539cd653dea1d0d4.diff

LOG: [InstCombine] add test for umax/umin intrinsic demanded bits; NFC

Added: 
    

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

Removed: 
    


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diff  --git a/llvm/test/Transforms/InstCombine/minmax-intrinsics.ll b/llvm/test/Transforms/InstCombine/minmax-intrinsics.ll
index ec57a790b240..b41b68a565b0 100644
--- a/llvm/test/Transforms/InstCombine/minmax-intrinsics.ll
+++ b/llvm/test/Transforms/InstCombine/minmax-intrinsics.ll
@@ -973,3 +973,47 @@ define i8 @smax_uses(i8 %x, i8 %y, i8 %z) {
   %m3 = call i8 @llvm.smax.i8(i8 %m1, i8 %m2)
   ret i8 %m3
 }
+
+define i8 @umax_demand_lshr(i8 %x) {
+; CHECK-LABEL: @umax_demand_lshr(
+; CHECK-NEXT:    [[M:%.*]] = call i8 @llvm.umax.i8(i8 [[X:%.*]], i8 15)
+; CHECK-NEXT:    [[R:%.*]] = lshr i8 [[M]], 4
+; CHECK-NEXT:    ret i8 [[R]]
+;
+  %m = call i8 @llvm.umax.i8(i8 %x, i8 15)
+  %r = lshr i8 %m, 4
+  ret i8 %r
+}
+
+define i8 @umax_demand_and(i8 %x) {
+; CHECK-LABEL: @umax_demand_and(
+; CHECK-NEXT:    [[M:%.*]] = call i8 @llvm.umax.i8(i8 [[X:%.*]], i8 1)
+; CHECK-NEXT:    [[R:%.*]] = and i8 [[M]], 10
+; CHECK-NEXT:    ret i8 [[R]]
+;
+  %m = call i8 @llvm.umax.i8(i8 1, i8 %x)
+  %r = and i8 %m, 10
+  ret i8 %r
+}
+
+define i8 @umin_demand_or_31_30(i8 %x) {
+; CHECK-LABEL: @umin_demand_or_31_30(
+; CHECK-NEXT:    [[M:%.*]] = call i8 @llvm.umin.i8(i8 [[X:%.*]], i8 -30)
+; CHECK-NEXT:    [[R:%.*]] = or i8 [[M]], 31
+; CHECK-NEXT:    ret i8 [[R]]
+;
+  %m = call i8 @llvm.umin.i8(i8 -30, i8 %x)
+  %r = or i8 %m, 31
+  ret i8 %r
+}
+
+define i8 @umin_demand_and_7_8(i8 %x) {
+; CHECK-LABEL: @umin_demand_and_7_8(
+; CHECK-NEXT:    [[M:%.*]] = call i8 @llvm.umin.i8(i8 [[X:%.*]], i8 -7)
+; CHECK-NEXT:    [[R:%.*]] = and i8 [[M]], -8
+; CHECK-NEXT:    ret i8 [[R]]
+;
+  %m = call i8 @llvm.umin.i8(i8 %x, i8 -7)
+  %r = and i8 %m, -8
+  ret i8 %r
+}