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Add a new option to indicate we want the code generator to emit code quickly,

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not spending tons of time microoptimizing it.  This is useful for an -O0
style of build.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24235 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2005-11-08 02:12:47 +00:00
parent 178e0c41ce
commit df2e425f2a
3 changed files with 9 additions and 7 deletions
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7
include/llvm/Target/TargetMachine.h
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@ -143,11 +143,12 @@ public:
/// addPassesToEmitFile - Add passes to the specified pass manager to get
/// the specified file emitted. Typically this will involve several steps of
/// code generation. This method should return true if emission of this file
/// type is not supported.
/// code generation. If Fast is set to true, the code generator should emit
/// code as fast as possible, without regard for compile time. This method
/// should return true if emission of this file type is not supported.
///
virtual bool addPassesToEmitFile(PassManager &PM, std::ostream &Out,
CodeGenFileType FileType) {
CodeGenFileType FileType, bool Fast) {
return true;
}

7
lib/Target/PowerPC/PPCTargetMachine.cpp
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@ -77,11 +77,12 @@ PPCTargetMachine::PPCTargetMachine(const Module &M, IntrinsicLowering *IL,
///
bool PPCTargetMachine::addPassesToEmitFile(PassManager &PM,
std::ostream &Out,
CodeGenFileType FileType) {
CodeGenFileType FileType,
bool Fast) {
if (FileType != TargetMachine::AssemblyFile) return true;
// Run loop strength reduction before anything else.
PM.add(createLoopStrengthReducePass());
if (!Fast) PM.add(createLoopStrengthReducePass());
// FIXME: Implement efficient support for garbage collection intrinsics.
PM.add(createLowerGCPass());
@ -90,7 +91,7 @@ bool PPCTargetMachine::addPassesToEmitFile(PassManager &PM,
PM.add(createLowerInvokePass());
// Clean up after other passes, e.g. merging critical edges.
PM.add(createCFGSimplificationPass());
if (!Fast) PM.add(createCFGSimplificationPass());
// FIXME: Implement the switch instruction in the instruction selector!
PM.add(createLowerSwitchPass());

2
lib/Target/PowerPC/PPCTargetMachine.h
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@ -53,7 +53,7 @@ public:
static unsigned getModuleMatchQuality(const Module &M);
virtual bool addPassesToEmitFile(PassManager &PM, std::ostream &Out,
CodeGenFileType FileType);
CodeGenFileType FileType, bool Fast);
bool addPassesToEmitMachineCode(FunctionPassManager &PM,
MachineCodeEmitter &MCE);