[llvm] 5afd39d - [InstCombine] Add test for op of phi in loop (NFC)

[Nikita Popov via llvm-commits]

Author: Nikita Popov
Date: 2024-08-26T14:33:28+02:00
New Revision: 5afd39d6e4df7e1f4f8c6f7bb6e2cda775beed6a

URL: https://github.com/llvm/llvm-project/commit/5afd39d6e4df7e1f4f8c6f7bb6e2cda775beed6a
DIFF: https://github.com/llvm/llvm-project/commit/5afd39d6e4df7e1f4f8c6f7bb6e2cda775beed6a.diff

LOG: [InstCombine] Add test for op of phi in loop (NFC)

Added: 
    

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

Removed: 
    


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diff  --git a/llvm/test/Transforms/InstCombine/phi.ll b/llvm/test/Transforms/InstCombine/phi.ll
index e03e45312687bc..673c8f6c9488d6 100644
--- a/llvm/test/Transforms/InstCombine/phi.ll
+++ b/llvm/test/Transforms/InstCombine/phi.ll
@@ -2714,3 +2714,31 @@ join:
   %cmp = icmp slt i32 %13, 0
   ret i1 %cmp
 }
+
+define void @phi_op_in_loop(i1 %c, i32 %x) {
+; CHECK-LABEL: @phi_op_in_loop(
+; CHECK-NEXT:    br label [[LOOP:%.*]]
+; CHECK:       loop:
+; CHECK-NEXT:    br i1 [[C:%.*]], label [[IF:%.*]], label [[LOOP_LATCH:%.*]]
+; CHECK:       if:
+; CHECK-NEXT:    br label [[LOOP_LATCH]]
+; CHECK:       loop.latch:
+; CHECK-NEXT:    [[PHI:%.*]] = phi i32 [ [[X:%.*]], [[IF]] ], [ 0, [[LOOP]] ]
+; CHECK-NEXT:    [[AND:%.*]] = and i32 [[PHI]], 1
+; CHECK-NEXT:    call void @use(i32 [[AND]])
+; CHECK-NEXT:    br label [[LOOP]]
+;
+  br label %loop
+
+loop:
+  br i1 %c, label %if, label %loop.latch
+
+if:
+  br label %loop.latch
+
+loop.latch:
+  %phi = phi i32 [ %x, %if ], [ 0, %loop ]
+  %and = and i32 %phi, 1
+  call void @use(i32 %and)
+  br label %loop
+}