[LLVMbugs] [Bug 1857] New: Patch for Edge Profiling Correctness

bugzilla-daemon at cs.uiuc.edu bugzilla-daemon at cs.uiuc.edu
Wed Dec 12 10:37:42 PST 2007


           Summary: Patch for Edge Profiling Correctness
           Product: libraries
           Version: 2.1
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: minor
          Priority: P2
         Component: Miscellaneous Instrumentation passes
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: mdekruijf at gmail.com
                CC: llvmbugs at cs.uiuc.edu

The diff below makes edge profiling work correctly.  Previously, function and
basic block counts using edge profiling were inconsistent with those found
doing block/function profiling directly.  The code now also matches the

$ svn diff lib/Transforms/Instrumentation/EdgeProfiling.cpp
Index: EdgeProfiling.cpp
--- EdgeProfiling.cpp   (revision 4)
+++ EdgeProfiling.cpp   (working copy)
@@ -84,7 +84,7 @@
           // Okay, we are guaranteed that the edge is no longer critical.  If
           // only have a single successor, insert the counter in this block,
           // otherwise insert it in the successor block.
-          if (TI->getNumSuccessors() == 0) {
+          if (TI->getNumSuccessors() == 1) {
             // Insert counter at the start of the block
             IncrementCounterInBlock(BB, i++, Counters);
           } else {

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