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authorChris Lattner <sabre@nondot.org>2007-08-13 17:09:08 +0000
committerChris Lattner <sabre@nondot.org>2007-08-13 17:09:08 +0000
commitfe9d82a71bac418d82f14d28d654dedea66083d5 (patch)
tree960759c1095a962c1635dedb2c1c50d541f398f1 /lib/CodeGen/LiveIntervalAnalysis.cpp
parent6047dd928067c9e2127c74152d22517ef3940d87 (diff)
Constant fold: getelementptr (i8* inttoptr (i64 1 to i8*), i32 -1)
Into: inttoptr (i64 0 to i8*) -> null This occurs in the example in PR1602. With this fixed, we now compile the example in PR1602 into fully "devirtualized" code: define void @_Z1g1S(%struct.S* noalias %s) { entry: %tmp131415 = getelementptr %struct.S* %s, i32 0, i32 0 ; <i32 (...)***> [#uses=1] %tmp16 = load i32 (...)*** %tmp131415, align 4 ; <i32 (...)**> [#uses=1] %tmp26277 = load i32 (...)** %tmp16 ; <i32 (...)*> [#uses=1] %tmp2829 = bitcast i32 (...)* %tmp26277 to void (%struct.S*)* ; <void (%struct.S*)*> [#uses=1] tail call void %tmp2829( %struct.S* %s ) ret void } This still has the vtable dispatch (as required) but does not have any pointer to method cruft left. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41046 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/LiveIntervalAnalysis.cpp')
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