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Fix X86 subtarget to not overwrite the autodetected features by calling InitMCProcessorInfo right after detecting them. Instead add a new function that only updates the scheduling model and call that.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@190919 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Craig Topper 2013-09-18 05:54:09 +00:00
parent b8f54d86f2
commit 773c07606e
3 changed files with 9 additions and 1 deletions
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3
include/llvm/MC/MCSubtargetInfo.h
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@ -72,6 +72,9 @@ public:
/// feature string). Recompute feature bits and scheduling model.
void InitMCProcessorInfo(StringRef CPU, StringRef FS);
/// InitCPUSchedModel - Recompute scheduling model based on CPU.
void InitCPUSchedModel(StringRef CPU);
/// ToggleFeature - Toggle a feature and returns the re-computed feature
/// bits. This version does not change the implied bits.
uint64_t ToggleFeature(uint64_t FB);

5
lib/MC/MCSubtargetInfo.cpp
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@ -27,6 +27,11 @@ MCSubtargetInfo::InitMCProcessorInfo(StringRef CPU, StringRef FS) {
FeatureBits = Features.getFeatureBits(CPU, ProcDesc, NumProcs,
ProcFeatures, NumFeatures);
InitCPUSchedModel(CPU);
}
void
MCSubtargetInfo::InitCPUSchedModel(StringRef CPU) {
if (!CPU.empty())
CPUSchedModel = getSchedModelForCPU(CPU);
else

2
lib/Target/X86/X86Subtarget.cpp
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@ -453,7 +453,7 @@ void X86Subtarget::resetSubtargetFeatures(StringRef CPU, StringRef FS) {
// CPUName may have been set by the CPU detection code. Make sure the
// new MCSchedModel is used.
InitMCProcessorInfo(CPUName, FS);
InitCPUSchedModel(CPUName);
if (X86ProcFamily == IntelAtom || X86ProcFamily == IntelSLM)
PostRAScheduler = true;