conditional jump valgrind error

Why does Valgrind have a conditional jump or move error?
This error is caused if you forget to initialize variables before using or accessing them. You can usually re-run valgrind with the flag --track-origins=yes to see where the uninitialized value came from. Conditional jump or move depends on uninitialised value (s) at 0x1091D1: main (valgrind-test.cpp:9)
Why does Valgrind not give a warning?
What that means is that it will only give out a warning if the execution of the program is altered due to the uninitialized value (ie. the program takes a different branch in an if statement, for example). Since the actual arithmetic did not involve a conditional jump or move, valgrind did not warn you of that.
Can Valgrind track the origin of an uninitialized value?
Use the valgrind option --track-origins=yes to have it track the origin of uninitialized values. This will make it slower and take more memory, but can be very helpful if you need to track down the origin of an uninitialized value. Update: Regarding the point at which the uninitialized value is reported, the valgrind manual states:
What does conditional jump or move depend on uninitialized value(s) mean?
The error message "Conditional jump or move depends on uninitialized value (s)" essentially means Valgrind has determined that the result of your program depends on uninitialized memory. Sometimes you will also see the message "Use of uninitialized value of size N".

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PDF	Using Valgrind to detect undefined value errors with bit-precision dicates that a conditional jump depends on an undefined value. The third indicates that an undefined value is used as a pointer. All three error messages

PDF	Getting Started# Supported Architectures# Getting Valgrind Valgrind is a framework that allows for dynamic instrumentation of executables. The first error reported is a conditional jump or move that depends on ...

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PDF	Valgrind testing suite - GitHub Pages Conditional jump or move depends on uninitialised value(s) Helgrind is a Valgrind tool for detecting synchronization errors in C, C++ (and Fortran) programs

PDF	Program Analysis with Valgrind MSE – Memory Segment Error ==23779== Using Valgrind-3 5 0 and LibVEX; ==24599== Conditional jump or move depends on uninitialised value(s)

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PDF	MemCheck: Using Valgrind to detect undefined value errors with bit dicates that a conditional jump depends on an undefined value The third indicates that an undefined value is used as a pointer All three error messages

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