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llvm.mdpp
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llvm.mdpp
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## LLVM IR
##### clang -O1 -S -emit-llvm foo.c -o foo.ll
```llvm
!INCLUDE "sources/foo.modified.ll"
```
---
.selectiondag[]
---
## TargetLowering - SelectionDAG
#### SDNode
##### llc -O1 -view-dag-combine1-dags foo.ll
.selectiondagmodified[]
---
## SelectionDAG legalization
#### SDNode
##### llc -O1 -view-isel-dags foo.ll
* Remove illegal types
```llvm
i1 -> i32
```
* Remove target-illegal instructions
```llvm
mul i32 %a, 8
```
to
```llvm
shl i32 %a, 3
```
---
## SelectionDAGISel
#### MachineSDNode
##### llc -O1 -view-sched-dags foo.ll
.selectiondagmodified[]
---
## SelectionDAGISel
#### MachineSDNode
##### llvm/lib/Target/X86/X86InstrCompiler.td
```tablegen
def : Pat<(add GR32:$src1, GR32:$src2), (ADD32rr GR32:$src1, GR32:$src2)>;
```
---
## ScheduleDAG
#### MachineInstr
##### llc -O1 -print-before=expand-isel-pseudos foo.ll
```llvm
!INCLUDE "sources/schedule-dag.sd"
```
---
## Register allocation
#### Non-SSA MachineInstr
##### llc -O1 -print-machineinstrs=virtregrewriter foo.ll
```llvm
!INCLUDE "sources/regalloc.modified.sd"
```
---
## MCInstLower
#### MCInst
##### llc -O1 -asm-show-inst foo.ll -o foo.s
.mcinst[
```mcinst
!INCLUDE "sources/mcinst.modified.s"
```
]
---
## AsmPrinter
#### Assembly
##### llc -O1 foo.ll -o foo.s / clang -O1 foo.c -S -o foo.s
.asmprinter[
```x86
!INCLUDE "sources/foo.modified.s"
```
]
---
## AsmPrinter
#### Assembly
##### lib/Target/X86/X86InstrArithmetic.td
```tablegen
*def LEA64_32r : I<0x8D, MRMSrcMem,
(outs GR32:$dst), (ins lea64_32mem:$src),
"lea{l}\t{$src|$dst}, {$dst|$src}",
[(set GR32:$dst, lea64_32addr:$src)], IIC_LEA>,
OpSize32, Requires<[In64BitMode]>;
```
---
## AsmPrinter
#### Assembly
##### lib/Target/X86/X86InstrArithmetic.td
```tablegen
def LEA64_32r : I<0x8D, MRMSrcMem,
* (outs GR32:$dst), (ins lea64_32mem:$src),
"lea{l}\t{$src|$dst}, {$dst|$src}",
[(set GR32:$dst, lea64_32addr:$src)], IIC_LEA>,
OpSize32, Requires<[In64BitMode]>;
```
---
## AsmPrinter
#### Assembly
##### lib/Target/X86/X86InstrArithmetic.td
```tablegen
def LEA64_32r : I<0x8D, MRMSrcMem,
(outs GR32:$dst), (ins lea64_32mem:$src),
* "lea{l}\t{$src|$dst}, {$dst|$src}",
[(set GR32:$dst, lea64_32addr:$src)], IIC_LEA>,
OpSize32, Requires<[In64BitMode]>;
```
---
## AsmPrinter
#### Assembly
##### lib/Target/X86/X86InstrArithmetic.td
```tablegen
def LEA64_32r : I<0x8D, MRMSrcMem,
(outs GR32:$dst), (ins lea64_32mem:$src),
"lea{l}\t{$src|$dst}, {$dst|$src}",
* [(set GR32:$dst, lea64_32addr:$src)], IIC_LEA>,
OpSize32, Requires<[In64BitMode]>;
```
---
## MCCodeEmitter
#### ELF
##### clang -c -fintegrated-as -O1 foo.c -o foo.o
##### llvm-objdump -disassemble foo.o
.objdump[
```objdump
!INCLUDE "sources/foo.objdump.modified"
```
]