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Add low-level option for avoiding float stores from va_start until 

soft-float is properly supported.

llvm-svn: 215221
This commit is contained in:
Joerg Sonnenberger 2014-08-08 16:46:10 +00:00
parent 0013b9292d
commit eb8655afd3
1 changed files with 7 additions and 1 deletions
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8
llvm/lib/Target/PowerPC/PPCISelLowering.cpp
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@ -39,6 +39,10 @@
#include "llvm/Target/TargetOptions.h"
using namespace llvm;
// FIXME: Remove this once soft-float is supported.
static cl::opt<bool> DisablePPCFloatInVariadic("disable-ppc-float-in-variadic",
cl::desc("disable saving float registers for va_start on PPC"), cl::Hidden);
static cl::opt<bool> DisablePPCPreinc("disable-ppc-preinc",
cl::desc("disable preincrement load/store generation on PPC"), cl::Hidden);
@ -2494,7 +2498,9 @@ PPCTargetLowering::LowerFormalArguments_32SVR4(
PPC::F1, PPC::F2, PPC::F3, PPC::F4, PPC::F5, PPC::F6, PPC::F7,
PPC::F8
};
const unsigned NumFPArgRegs = array_lengthof(FPArgRegs);
unsigned NumFPArgRegs = array_lengthof(FPArgRegs);
if (DisablePPCFloatInVariadic)
NumFPArgRegs = 0;
FuncInfo->setVarArgsNumGPR(CCInfo.getFirstUnallocated(GPArgRegs,
NumGPArgRegs));