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| author | Bill Schmidt <wschmidt@linux.vnet.ibm.com> | 2013-02-01 02:14:03 +0000 |
|---|---|---|
| committer | Bill Schmidt <wschmidt@linux.vnet.ibm.com> | 2013-02-01 02:14:03 +0000 |
| commit | 199402b9e081dedc28e19ab6e727470b34f2f64d (patch) | |
| tree | 5346e9860482fe16144fc18355e74f56ad33b1d8 /lib/Basic | |
| parent | a31f65b10e61ca8f2f427b1df176c10ea8a0efa2 (diff) | |
Enable -fno-altivec, -mno-altivec for PowerPC.
Introduces these negation forms explicitly and uses them to control a new
"altivec" target feature for PowerPC. This allows avoiding generating
Altivec instructions on processors that support Altivec.
The new test case verifies that the Altivec "lvx" instruction is not
used when -fno-altivec is present on the command line.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@174140 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Basic')
| -rw-r--r-- | lib/Basic/Targets.cpp | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/lib/Basic/Targets.cpp b/lib/Basic/Targets.cpp index 27984dfbf4..4d0a833d23 100644 --- a/lib/Basic/Targets.cpp +++ b/lib/Basic/Targets.cpp @@ -711,6 +711,12 @@ public: virtual void getTargetDefines(const LangOptions &Opts, MacroBuilder &Builder) const; + virtual void getDefaultFeatures(llvm::StringMap<bool> &Features) const; + + virtual bool setFeatureEnabled(llvm::StringMap<bool> &Features, + StringRef Name, + bool Enabled) const; + virtual bool hasFeature(StringRef Feature) const; virtual void getGCCRegNames(const char * const *&Names, @@ -907,7 +913,32 @@ void PPCTargetInfo::getTargetDefines(const LangOptions &Opts, if (defs & ArchDefinePwr6) { Builder.defineMacro("_ARCH_PWR5"); Builder.defineMacro("_ARCH_PWR6"); + } +} + +void PPCTargetInfo::getDefaultFeatures(llvm::StringMap<bool> &Features) const { + Features["altivec"] = llvm::StringSwitch<bool>(CPU) + .Case("7400", true) + .Case("g4", true) + .Case("7450", true) + .Case("g4+", true) + .Case("970", true) + .Case("g5", true) + .Case("pwr6", true) + .Case("pwr7", true) + .Case("ppc64", true) + .Default(false); +} + +bool PPCTargetInfo::setFeatureEnabled(llvm::StringMap<bool> &Features, + StringRef Name, + bool Enabled) const { + if (Name == "altivec") { + Features[Name] = Enabled; + return true; } + + return false; } bool PPCTargetInfo::hasFeature(StringRef Feature) const { |