[llvm] r188113 - DataFlowSanitizer: Remove unreachable BBs so IR continues to verify
Peter Collingbourne
peter at pcc.me.uk
Fri Aug 9 14:42:54 PDT 2013
Author: pcc
Date: Fri Aug 9 16:42:53 2013
New Revision: 188113
URL: http://llvm.org/viewvc/llvm-project?rev=188113&view=rev
Log:
DataFlowSanitizer: Remove unreachable BBs so IR continues to verify
under the args ABI.
Differential Revision: http://llvm-reviews.chandlerc.com/D1316
Added:
llvm/trunk/test/Instrumentation/DataFlowSanitizer/args-unreachable-bb.ll
Modified:
llvm/trunk/lib/Transforms/Instrumentation/DataFlowSanitizer.cpp
Modified: llvm/trunk/lib/Transforms/Instrumentation/DataFlowSanitizer.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Transforms/Instrumentation/DataFlowSanitizer.cpp?rev=188113&r1=188112&r2=188113&view=diff
==============================================================================
--- llvm/trunk/lib/Transforms/Instrumentation/DataFlowSanitizer.cpp (original)
+++ llvm/trunk/lib/Transforms/Instrumentation/DataFlowSanitizer.cpp Fri Aug 9 16:42:53 2013
@@ -59,6 +59,7 @@
#include "llvm/Pass.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Transforms/Utils/BasicBlockUtils.h"
+#include "llvm/Transforms/Utils/Local.h"
#include "llvm/Transforms/Utils/SpecialCaseList.h"
#include <iterator>
@@ -402,6 +403,8 @@ bool DataFlowSanitizer::runOnModule(Modu
if ((*i)->isDeclaration())
continue;
+ removeUnreachableBlocks(**i);
+
DFSanFunction DFSF(*this, *i);
// DFSanVisitor may create new basic blocks, which confuses df_iterator.
Added: llvm/trunk/test/Instrumentation/DataFlowSanitizer/args-unreachable-bb.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/Instrumentation/DataFlowSanitizer/args-unreachable-bb.ll?rev=188113&view=auto
==============================================================================
--- llvm/trunk/test/Instrumentation/DataFlowSanitizer/args-unreachable-bb.ll (added)
+++ llvm/trunk/test/Instrumentation/DataFlowSanitizer/args-unreachable-bb.ll Fri Aug 9 16:42:53 2013
@@ -0,0 +1,20 @@
+; RUN: opt < %s -dfsan -verify -dfsan-args-abi -S | FileCheck %s
+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"
+
+define i8 @unreachable_bb() {
+ ; CHECK: @unreachable_bb
+ ; CHECK: ret { i8, i16 } { i8 1, i16 0 }
+ ; CHECK-NOT: bb2:
+ ; CHECK-NOT: bb3:
+ ; CHECK-NOT: bb4:
+ ret i8 1
+
+bb2:
+ ret i8 2
+
+bb3:
+ br label %bb4
+
+bb4:
+ br label %bb3
+}
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