[llvm-branch-commits] [llvm] ae9c45b - [JumpThreading][NFC] Pre-commit for invalid LVI.

[Tobias Hieta via llvm-branch-commits]

Author: DianQK
Date: 2023-09-05T09:00:53+02:00
New Revision: ae9c45b112598aa9a411ffe4cebd213d7f9186b6

URL: https://github.com/llvm/llvm-project/commit/ae9c45b112598aa9a411ffe4cebd213d7f9186b6
DIFF: https://github.com/llvm/llvm-project/commit/ae9c45b112598aa9a411ffe4cebd213d7f9186b6.diff

LOG: [JumpThreading][NFC] Pre-commit for invalid LVI.

(cherry picked from commit 5855a4be9cbc3c4584d8a1632886c347044dfbef)

Added: 
    llvm/test/Transforms/JumpThreading/invalidate-lvi.ll

Modified: 
    

Removed: 
    


################################################################################
diff  --git a/llvm/test/Transforms/JumpThreading/invalidate-lvi.ll b/llvm/test/Transforms/JumpThreading/invalidate-lvi.ll
new file mode 100644
index 00000000000000..9c5cbfac62d9fb
--- /dev/null
+++ b/llvm/test/Transforms/JumpThreading/invalidate-lvi.ll
@@ -0,0 +1,53 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 3
+; RUN: opt -S -passes=jump-threading < %s | FileCheck %s
+
+declare void @set_value(ptr)
+
+declare void @bar()
+
+define void @foo(i1 %0) {
+; CHECK-LABEL: define void @foo(
+; CHECK-SAME: i1 [[TMP0:%.*]]) {
+; CHECK-NEXT:  start:
+; CHECK-NEXT:    [[V:%.*]] = alloca i64, align 8
+; CHECK-NEXT:    call void @set_value(ptr [[V]])
+; CHECK-NEXT:    [[L1:%.*]] = load i64, ptr [[V]], align 8
+; CHECK-NEXT:    br i1 [[TMP0]], label [[BB0:%.*]], label [[BB4:%.*]]
+; CHECK:       bb0:
+; CHECK-NEXT:    [[C1:%.*]] = icmp eq i64 [[L1]], 0
+; CHECK-NEXT:    br i1 [[C1]], label [[BB1:%.*]], label [[BB4]]
+; CHECK:       bb1:
+; CHECK-NEXT:    store i64 0, ptr [[V]], align 8
+; CHECK-NEXT:    br label [[BB4]]
+; CHECK:       bb4:
+; CHECK-NEXT:    [[L2:%.*]] = phi i64 [ 0, [[BB1]] ], [ [[L1]], [[BB0]] ], [ [[L1]], [[START:%.*]] ]
+; CHECK-NEXT:    ret void
+;
+start:
+  %v = alloca i64, align 8
+  call void @set_value(ptr %v)
+  %l1 = load i64, ptr %v, align 8, !range !0
+  br i1 %0, label %bb0, label %bb2
+
+bb0:                                              ; preds = %start
+  %c1 = icmp eq i64 %l1, 0
+  br i1 %c1, label %bb1, label %bb2
+
+bb1:                                              ; preds = %bb0
+  store i64 0, ptr %v, align 8
+  br label %bb2
+
+bb2:                                              ; preds = %bb1, %bb0, %start
+  %l2 = load i64, ptr %v, align 8
+  %1 = icmp eq i64 %l2, 2
+  br i1 %1, label %bb3, label %bb4
+
+bb3:                                              ; preds = %bb2
+  call void @bar()
+  ret void
+
+bb4:                                              ; preds = %bb2
+  ret void
+}
+
+!0 = !{i64 0, i64 2}