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Issue libcalls __udivmod*i4 / __divmod*i4 for div / rem pairs.

Browse Source 
rdar://8911343


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@128696 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng
2011-04-01 00:42:02 +00:00
parent e3662cca5d
commit 8e23e815ad
4 changed files with 174 additions and 19 deletions
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10
lib/Target/ARM/ARMISelLowering.cpp
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@@ -72,6 +72,11 @@ ARMInterworking("arm-interworking", cl::Hidden,
cl::desc("Enable / disable ARM interworking (for debugging only)"),
cl::init(true));
static cl::opt<bool>
UseDivMod("arm-divmod-libcall", cl::Hidden,
cl::desc("Use __{u}divmod libcalls for div / rem pairs"),
cl::init(false));
void ARMTargetLowering::addTypeForNEON(EVT VT, EVT PromotedLdStVT,
EVT PromotedBitwiseVT) {
if (VT != PromotedLdStVT) {
@@ -393,6 +398,11 @@ ARMTargetLowering::ARMTargetLowering(TargetMachine &TM)
setLibcallCallingConv(RTLIB::UDIV_I32, CallingConv::ARM_AAPCS);
}
if (UseDivMod) {
setLibcallName(RTLIB::SDIVREM_I32, "__divmodsi4");
setLibcallName(RTLIB::UDIVREM_I32, "__udivmodsi4");
}
if (Subtarget->isThumb1Only())
addRegisterClass(MVT::i32, ARM::tGPRRegisterClass);
else