Reduced dont-infinite-loop-during-block-escape-analysis.ll with bugpoint and moved...

*NOTE* I verified that the original bug behind
dont-infinite-loop-during-block-escape-analysis.ll occurs when using opt on
retain-block-escape-analysis.ll.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@177240 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/Transforms/ObjCARC/dont-infinite-loop-during-block-escape-analysis.ll b/test/Transforms/ObjCARC/dont-infinite-loop-during-block-escape-analysis.ll
deleted file mode 100644 (file)
index bdee2be..0000000
--- a/test/Transforms/ObjCARC/dont-infinite-loop-during-block-escape-analysis.ll
+++ /dev/null
@@ -1,87 +0,0 @@
-; RUN: opt -S -objc-arc < %s
-; bugzilla://14551
-; rdar://12851911
-
-; Make sure that we do not hang clang during escape analysis.
-
-target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
-target triple = "x86_64-darwin"
-
-%struct.__block_descriptor = type { i64, i64 }
-%struct.__block_byref_foo = type { i8*, %struct.__block_byref_foo*, i32, i32, i32 }
-
-@_NSConcreteGlobalBlock = external global i8*
-@.str = private unnamed_addr constant [6 x i8] c"v8@?0\00", align 1
-@__block_descriptor_tmp = internal constant { i64, i64, i8*, i8* } { i64 0, i64 32, i8* getelementptr inbounds ([6 x i8]* @.str, i32 0, i32 0), i8* null }
-@__block_literal_global = internal constant { i8**, i32, i32, i8*, %struct.__block_descriptor* } { i8** @_NSConcreteGlobalBlock, i32 1342177280, i32 0, i8* bitcast (void (i8*)* @__hang_clang_block_invoke to i8*), %struct.__block_descriptor* bitcast ({ i64, i64, i8*, i8* }* @__block_descriptor_tmp to %struct.__block_descriptor*) }, align 8
-
-define void @hang_clang() uwtable optsize ssp {
-entry:
-  %foo = alloca %struct.__block_byref_foo, align 8
-  %byref.isa = getelementptr inbounds %struct.__block_byref_foo* %foo, i64 0, i32 0
-  store i8* null, i8** %byref.isa, align 8
-  %byref.forwarding = getelementptr inbounds %struct.__block_byref_foo* %foo, i64 0, i32 1
-  store %struct.__block_byref_foo* %foo, %struct.__block_byref_foo** %byref.forwarding, align 8
-  %byref.flags = getelementptr inbounds %struct.__block_byref_foo* %foo, i64 0, i32 2
-  store i32 536870912, i32* %byref.flags, align 8
-  %byref.size = getelementptr inbounds %struct.__block_byref_foo* %foo, i64 0, i32 3
-  store i32 32, i32* %byref.size, align 4
-  %foo1 = getelementptr inbounds %struct.__block_byref_foo* %foo, i64 0, i32 4
-  store i32 0, i32* %foo1, align 8, !tbaa !4
-  br label %for.body
-
-for.body:                                         ; preds = %for.inc.for.body_crit_edge, %entry
-  %0 = phi i1 [ true, %entry ], [ %phitmp, %for.inc.for.body_crit_edge ]
-  %i.06 = phi i32 [ 1, %entry ], [ %phitmp8, %for.inc.for.body_crit_edge ]
-  %block.05 = phi void (...)* [ null, %entry ], [ %block.1, %for.inc.for.body_crit_edge ]
-  br i1 %0, label %for.inc, label %if.then
-
-if.then:                                          ; preds = %for.body
-  %1 = call i8* @objc_retainBlock(i8* bitcast ({ i8**, i32, i32, i8*, %struct.__block_descriptor* }* @__block_literal_global to i8*)) nounwind, !clang.arc.copy_on_escape !7
-  %2 = bitcast i8* %1 to void (...)*
-  %3 = bitcast void (...)* %block.05 to i8*
-  call void @objc_release(i8* %3) nounwind, !clang.imprecise_release !7
-  br label %for.inc
-
-for.inc:                                          ; preds = %for.body, %if.then
-  %block.1 = phi void (...)* [ %2, %if.then ], [ %block.05, %for.body ]
-  %exitcond = icmp eq i32 %i.06, 10
-  br i1 %exitcond, label %for.end, label %for.inc.for.body_crit_edge
-
-for.inc.for.body_crit_edge:                       ; preds = %for.inc
-  %.pre = load %struct.__block_byref_foo** %byref.forwarding, align 8
-  %foo2.phi.trans.insert = getelementptr inbounds %struct.__block_byref_foo* %.pre, i64 0, i32 4
-  %.pre7 = load i32* %foo2.phi.trans.insert, align 4, !tbaa !4
-  %phitmp = icmp eq i32 %.pre7, 0
-  %phitmp8 = add i32 %i.06, 1
-  br label %for.body
-
-for.end:                                          ; preds = %for.inc
-  %4 = bitcast %struct.__block_byref_foo* %foo to i8*
-  call void @_Block_object_dispose(i8* %4, i32 8)
-  %5 = bitcast void (...)* %block.1 to i8*
-  call void @objc_release(i8* %5) nounwind, !clang.imprecise_release !7
-  ret void
-}
-
-define internal void @__hang_clang_block_invoke(i8* nocapture %.block_descriptor) nounwind uwtable readnone optsize ssp {
-entry:
-  ret void
-}
-
-declare i8* @objc_retainBlock(i8*)
-
-declare void @objc_release(i8*) nonlazybind
-
-declare void @_Block_object_dispose(i8*, i32)
-
-!llvm.module.flags = !{!0, !1, !2, !3}
-
-!0 = metadata !{i32 1, metadata !"Objective-C Version", i32 2}
-!1 = metadata !{i32 1, metadata !"Objective-C Image Info Version", i32 0}
-!2 = metadata !{i32 1, metadata !"Objective-C Image Info Section", metadata !"__DATA, __objc_imageinfo, regular, no_dead_strip"}
-!3 = metadata !{i32 4, metadata !"Objective-C Garbage Collection", i32 0}
-!4 = metadata !{metadata !"int", metadata !5}
-!5 = metadata !{metadata !"omnipotent char", metadata !6}
-!6 = metadata !{metadata !"Simple C/C++ TBAA"}
-!7 = metadata !{}

diff --git a/test/Transforms/ObjCARC/retain-block-escape-analysis.ll b/test/Transforms/ObjCARC/retain-block-escape-analysis.ll
index 05f4c36ca9236ace037c0545a52f2120fad8d286..2c1ddce32836bc24de349e50dca96194fa0885e8 100644 (file)
--- a/test/Transforms/ObjCARC/retain-block-escape-analysis.ll
+++ b/test/Transforms/ObjCARC/retain-block-escape-analysis.ll
@@ -97,4 +97,31 @@ end:
   ret void
 }
 
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+; This test makes sure that we do not hang clang when visiting a use ;
+; cycle caused by phi nodes during objc-arc analysis. *NOTE* This    ;
+; test case looks a little convoluted since it was produced by      ;
+; bugpoint.                                                         ;
+;                                                                   ;
+; bugzilla://14551                                                  ;
+; rdar://12851911                                                   ;
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+
+define void @phinode_use_cycle(i8* %block) uwtable optsize ssp {
+; CHECK: define void @phinode_use_cycle(i8* %block)
+entry:
+  br label %for.body
+
+for.body:                                         ; preds = %if.then, %for.body, %entry
+  %block.05 = phi void (...)* [ null, %entry ], [ %1, %if.then ], [ %block.05, %for.body ]
+  br i1 undef, label %for.body, label %if.then
+
+if.then:                                          ; preds = %for.body
+  %0 = call i8* @objc_retainBlock(i8* %block), !clang.arc.copy_on_escape !0
+  %1 = bitcast i8* %0 to void (...)*
+  %2 = bitcast void (...)* %block.05 to i8*
+  call void @objc_release(i8* %2) nounwind, !clang.imprecise_release !0
+  br label %for.body
+}
+
 !0 = metadata !{}