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https://github.com/c64scene-ar/llvm-6502.git
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9c64030445
We have to do this in DAGBuilder instead of DAGCombiner, because the exact bit is lost after building.
struct foo { char x[24]; };
long bar(struct foo *a, struct foo *b) { return a-b; }
is now compiled into
movl 4(%esp), %eax
subl 8(%esp), %eax
sarl $3, %eax
imull $-1431655765, %eax, %eax
instead of
movl 4(%esp), %eax
subl 8(%esp), %eax
movl $715827883, %ecx
imull %ecx
movl %edx, %eax
shrl $31, %eax
sarl $2, %edx
addl %eax, %edx
movl %edx, %eax
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134695 91177308-0d34-0410-b5e6-96231b3b80d8
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|---|---|---|
| .. | ||
| CMakeLists.txt | ||
| DAGCombiner.cpp | ||
| FastISel.cpp | ||
| FunctionLoweringInfo.cpp | ||
| InstrEmitter.cpp | ||
| InstrEmitter.h | ||
| LegalizeDAG.cpp | ||
| LegalizeFloatTypes.cpp | ||
| LegalizeIntegerTypes.cpp | ||
| LegalizeTypes.cpp | ||
| LegalizeTypes.h | ||
| LegalizeTypesGeneric.cpp | ||
| LegalizeVectorOps.cpp | ||
| LegalizeVectorTypes.cpp | ||
| Makefile | ||
| ScheduleDAGFast.cpp | ||
| ScheduleDAGList.cpp | ||
| ScheduleDAGRRList.cpp | ||
| ScheduleDAGSDNodes.cpp | ||
| ScheduleDAGSDNodes.h | ||
| SDNodeDbgValue.h | ||
| SDNodeOrdering.h | ||
| SelectionDAG.cpp | ||
| SelectionDAGBuilder.cpp | ||
| SelectionDAGBuilder.h | ||
| SelectionDAGISel.cpp | ||
| SelectionDAGPrinter.cpp | ||
| TargetLowering.cpp | ||
| TargetSelectionDAGInfo.cpp | ||