[llvm] 31822e0 - [Test] Add test for PR52290

[Max Kazantsev via llvm-commits]

Author: Max Kazantsev
Date: 2021-10-25T18:25:59+07:00
New Revision: 31822e0530be06861c0c5d2becd6b8f27705d0e1

URL: https://github.com/llvm/llvm-project/commit/31822e0530be06861c0c5d2becd6b8f27705d0e1
DIFF: https://github.com/llvm/llvm-project/commit/31822e0530be06861c0c5d2becd6b8f27705d0e1.diff

LOG: [Test] Add test for PR52290

Demonstrates hang in iterativelySimplifyCFG.

Added: 
    llvm/test/Transforms/SimplifyCFG/pr52290.ll

Modified: 
    

Removed: 
    


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diff  --git a/llvm/test/Transforms/SimplifyCFG/pr52290.ll b/llvm/test/Transforms/SimplifyCFG/pr52290.ll
new file mode 100644
index 0000000000000..02e1455654f35
--- /dev/null
+++ b/llvm/test/Transforms/SimplifyCFG/pr52290.ll
@@ -0,0 +1,49 @@
+; RUN: opt < %s -simplifycfg -S | FileCheck %s
+; RUN: opt < %s -passes=simplifycfg -S | FileCheck %s
+
+; XFAIL: *
+; REQUIRES: asserts
+; FIXME: Fails due to infinite loop in iterativelySimplifyCFG.
+
+; ModuleID = 'test/Transforms/SimplifyCFG/pr-new.ll'
+source_filename = "test/Transforms/SimplifyCFG/pr-new.ll"
+
+define i32 @test(float %arg) gc "statepoint-example" personality i32* ()* @blam {
+; CHECK-LABEL: @test
+bb:
+  %tmp = call i1 @llvm.experimental.widenable.condition()
+  br i1 %tmp, label %bb2, label %bb1
+
+bb1:                                              ; preds = %bb
+  br i1 undef, label %bb7, label %bb5
+
+bb2:                                              ; preds = %bb
+  %tmp3 = getelementptr inbounds i8, i8 addrspace(1)* undef, i64 16
+  br i1 undef, label %bb6, label %bb4
+
+bb4:                                              ; preds = %bb2
+  call void @snork() [ "deopt"() ]
+  unreachable
+
+bb5:                                              ; preds = %bb1
+  ret i32 0
+
+bb6:                                              ; preds = %bb2
+  br label %bb7
+
+bb7:                                              ; preds = %bb6, %bb1
+  %tmp8 = call i32 (...) @llvm.experimental.deoptimize.i32(i32 10) [ "deopt"() ]
+  ret i32 %tmp8
+}
+
+declare i32* @blam()
+
+declare void @snork()
+
+declare i32 @llvm.experimental.deoptimize.i32(...)
+
+; Function Attrs: inaccessiblememonly nofree nosync nounwind speculatable willreturn
+declare i1 @llvm.experimental.widenable.condition() #0
+
+attributes #0 = { inaccessiblememonly nofree nosync nounwind speculatable willreturn }
+