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2012 Feb 10
1
[LLVMdev] Prevent DAG combiner from changing "store ConstFP, addr" to integer store
This code lives in DAGCombiner.cpp:
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// Turn 'store float 1.0, Ptr' -> 'store int 0x12345678, Ptr'
if (ConstantFPSDNode *CFP = dyn_cast<ConstantFPSDNode>(Value)) {
// NOTE: If the original store is volatile, this transform must not
increase
// the number of stores. For example, on x86-32 an f64 can be stored
in one
// processor operation but