[InstCombine] Add test for code after non-terminator unreachable (NFC)

llvm · Jun 22, 2023 · 893aa32 · 893aa32
1 parent 8aefa2b
commit 893aa32
Showing 1 changed file with 37 additions and 0 deletions.
diff --git a/llvm/test/Transforms/InstCombine/unreachable-code.ll b/llvm/test/Transforms/InstCombine/unreachable-code.ll
@@ -189,3 +189,40 @@ default:
   call void @dummy()
   ret void
 }
+
+define void @non_term_unreachable() {
+; CHECK-LABEL: define void @non_term_unreachable() {
+; CHECK-NEXT:    store i1 true, ptr poison, align 1
+; CHECK-NEXT:    call void @dummy()
+; CHECK-NEXT:    ret void
+;
+  store i1 true, ptr poison
+  call void @dummy()
+  ret void
+}
+
+define i32 @non_term_unreachable_phi(i1 %c) {
+; CHECK-LABEL: define i32 @non_term_unreachable_phi
+; CHECK-SAME: (i1 [[C:%.*]]) {
+; CHECK-NEXT:  entry:
+; CHECK-NEXT:    br i1 [[C]], label [[IF:%.*]], label [[JOIN:%.*]]
+; CHECK:       if:
+; CHECK-NEXT:    store i1 true, ptr poison, align 1
+; CHECK-NEXT:    call void @dummy()
+; CHECK-NEXT:    br label [[JOIN]]
+; CHECK:       join:
+; CHECK-NEXT:    [[PHI:%.*]] = phi i32 [ 1, [[IF]] ], [ 2, [[ENTRY:%.*]] ]
+; CHECK-NEXT:    ret i32 [[PHI]]
+;
+entry:
+  br i1 %c, label %if, label %join
+
+if:
+  store i1 true, ptr poison
+  call void @dummy()
+  br label %join
+
+join:
+  %phi = phi i32 [ 1, %if], [ 2, %entry ]
+  ret i32 %phi
+}