[llvm] 1d7d9d6 - [InstCombine] add tests for masked add; NFC

[Sanjay Patel via llvm-commits]

Author: Sanjay Patel
Date: 2020-11-17T12:13:44-05:00
New Revision: 1d7d9d668545818b3b8c1019e9c0a8565f68f62c

URL: https://github.com/llvm/llvm-project/commit/1d7d9d668545818b3b8c1019e9c0a8565f68f62c
DIFF: https://github.com/llvm/llvm-project/commit/1d7d9d668545818b3b8c1019e9c0a8565f68f62c.diff

LOG: [InstCombine] add tests for masked add; NFC

Added: 
    

Modified: 
    llvm/test/Transforms/InstCombine/and.ll

Removed: 
    


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diff  --git a/llvm/test/Transforms/InstCombine/and.ll b/llvm/test/Transforms/InstCombine/and.ll
index db54632b7149..68743ca15555 100644
--- a/llvm/test/Transforms/InstCombine/and.ll
+++ b/llvm/test/Transforms/InstCombine/and.ll
@@ -1062,6 +1062,29 @@ define i8 @lowmask_add(i8 %x) {
   ret i8 %r
 }
 
+define i8 @lowmask_add_2(i8 %x) {
+; CHECK-LABEL: @lowmask_add_2(
+; CHECK-NEXT:    [[R:%.*]] = and i8 [[X:%.*]], 63
+; CHECK-NEXT:    ret i8 [[R]]
+;
+  %a = add i8 %x, -64 ; 0xc0
+  %r = and i8 %a, 63 ; 0x3f
+  ret i8 %r
+}
+
+define i8 @lowmask_add_2_uses(i8 %x) {
+; CHECK-LABEL: @lowmask_add_2_uses(
+; CHECK-NEXT:    [[A:%.*]] = add i8 [[X:%.*]], -64
+; CHECK-NEXT:    call void @use8(i8 [[A]])
+; CHECK-NEXT:    [[R:%.*]] = and i8 [[A]], 63
+; CHECK-NEXT:    ret i8 [[R]]
+;
+  %a = add i8 %x, -64 ; 0xc0
+  call void @use8(i8 %a)
+  %r = and i8 %a, 63 ; 0x3f
+  ret i8 %r
+}
+
 define i8 @not_lowmask_add(i8 %x) {
 ; CHECK-LABEL: @not_lowmask_add(
 ; CHECK-NEXT:    [[A:%.*]] = add i8 [[X:%.*]], -64