[llvm] aefe411 - [LoongArch] Add a test for spurious mask removal. NFC

[WANG Rui via llvm-commits]

Author: WANG Rui
Date: 2024-07-21T13:42:26+08:00
New Revision: aefe411dae156350721268161e6cac36a8d29333

URL: https://github.com/llvm/llvm-project/commit/aefe411dae156350721268161e6cac36a8d29333
DIFF: https://github.com/llvm/llvm-project/commit/aefe411dae156350721268161e6cac36a8d29333.diff

LOG: [LoongArch] Add a test for spurious mask removal. NFC

Link: https://github.com/llvm/llvm-project/pull/99272#issuecomment-2241348794

Added: 
    

Modified: 
    llvm/test/CodeGen/LoongArch/andn-icmp.ll

Removed: 
    


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diff  --git a/llvm/test/CodeGen/LoongArch/andn-icmp.ll b/llvm/test/CodeGen/LoongArch/andn-icmp.ll
index 4fc3c8df4664c..447f3ac5c34fd 100644
--- a/llvm/test/CodeGen/LoongArch/andn-icmp.ll
+++ b/llvm/test/CodeGen/LoongArch/andn-icmp.ll
@@ -601,3 +601,25 @@ define i1 @andn_icmp_ult_i8_nn(i8 %a, i8 %b) nounwind {
   %cmp = icmp ult i8 %and, %b
   ret i1 %cmp
 }
+
+define i1 @andn_icmp_eq_i8_i32(i8 signext %a, i8 signext %b) nounwind {
+; LA32-LABEL: andn_icmp_eq_i8_i32:
+; LA32:       # %bb.0:
+; LA32-NEXT:    andn $a0, $a1, $a0
+; LA32-NEXT:    andi $a0, $a0, 255
+; LA32-NEXT:    sltui $a0, $a0, 1
+; LA32-NEXT:    ret
+;
+; LA64-LABEL: andn_icmp_eq_i8_i32:
+; LA64:       # %bb.0:
+; LA64-NEXT:    andn $a0, $a1, $a0
+; LA64-NEXT:    andi $a0, $a0, 255
+; LA64-NEXT:    sltui $a0, $a0, 1
+; LA64-NEXT:    ret
+  %x = zext i8 %a to i32
+  %y = zext i8 %b to i32
+  %not = xor i32 %x, -1
+  %and = and i32 %not, %y
+  %cmp = icmp eq i32 %and, 0
+  ret i1 %cmp
+}