diff options
| author | Bill Wendling <isanbard@gmail.com> | 2007-12-07 21:42:31 +0000 |
|---|---|---|
| committer | Bill Wendling <isanbard@gmail.com> | 2007-12-07 21:42:31 +0000 |
| commit | 0f940c95d4506f8d04fa2aeda8a79cadb3105fe3 (patch) | |
| tree | 8e87e91a393dc4f8d9ceac9ee8cea7b5bf12e6a3 /lib/CodeGen/LLVMTargetMachine.cpp | |
| parent | 779ccea5b624eae7f2440444e342339aa372f42c (diff) | |
Initial commit of the machine code LICM pass. It successfully hoists this:
_foo:
li r2, 0
LBB1_1: ; bb
li r5, 0
stw r5, 0(r3)
addi r2, r2, 1
addi r3, r3, 4
cmplw cr0, r2, r4
bne cr0, LBB1_1 ; bb
LBB1_2: ; return
blr
to:
_foo:
li r2, 0
li r5, 0
LBB1_1: ; bb
stw r5, 0(r3)
addi r2, r2, 1
addi r3, r3, 4
cmplw cr0, r2, r4
bne cr0, LBB1_1 ; bb
LBB1_2: ; return
blr
ZOMG!! :-)
Moar to come...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44687 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/LLVMTargetMachine.cpp')
| -rw-r--r-- | lib/CodeGen/LLVMTargetMachine.cpp | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/lib/CodeGen/LLVMTargetMachine.cpp b/lib/CodeGen/LLVMTargetMachine.cpp index 526c5255fe..7776d67b2a 100644 --- a/lib/CodeGen/LLVMTargetMachine.cpp +++ b/lib/CodeGen/LLVMTargetMachine.cpp @@ -66,7 +66,9 @@ LLVMTargetMachine::addPassesToEmitFile(FunctionPassManager &PM, // Print the instruction selected machine code... if (PrintMachineCode) PM.add(createMachineFunctionPrinterPass(cerr)); - + + PM.add(createMachineLICMPass()); + // Perform register allocation to convert to a concrete x86 representation PM.add(createRegisterAllocator()); @@ -92,7 +94,7 @@ LLVMTargetMachine::addPassesToEmitFile(FunctionPassManager &PM, // Branch folding must be run after regalloc and prolog/epilog insertion. if (!Fast) PM.add(createBranchFoldingPass(getEnableTailMergeDefault())); - + // Fold redundant debug labels. PM.add(createDebugLabelFoldingPass()); @@ -175,7 +177,9 @@ bool LLVMTargetMachine::addPassesToEmitMachineCode(FunctionPassManager &PM, // Print the instruction selected machine code... if (PrintMachineCode) PM.add(createMachineFunctionPrinterPass(cerr)); - + + PM.add(createMachineLICMPass()); + // Perform register allocation to convert to a concrete x86 representation PM.add(createRegisterAllocator()); @@ -204,7 +208,7 @@ bool LLVMTargetMachine::addPassesToEmitMachineCode(FunctionPassManager &PM, // Branch folding must be run after regalloc and prolog/epilog insertion. if (!Fast) PM.add(createBranchFoldingPass(getEnableTailMergeDefault())); - + if (addPreEmitPass(PM, Fast) && PrintMachineCode) PM.add(createMachineFunctionPrinterPass(cerr)); |