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authorDiana Picus <diana.picus@linaro.org>2019-01-17 10:11:55 +0000
committerDiana Picus <diana.picus@linaro.org>2019-01-17 10:11:55 +0000
commitd5c2499aecc6ab178487c8ee0376b41c6d95af54 (patch)
treeb4665370c9468745f3e4ba7d9c0af796cf46e97d /llvm/lib/Target/ARM/ARMCallLowering.cpp
parent88a13b91591747ca1b399f8937c022f710360837 (diff)
downloadbcm5719-llvm-d5c2499aecc6ab178487c8ee0376b41c6d95af54.tar.gz
bcm5719-llvm-d5c2499aecc6ab178487c8ee0376b41c6d95af54.zip
[ARM GlobalISel] Allow calls to varargs functions
Allow varargs functions to be called, both in arm and thumb mode. This boils down to choosing the correct calling convention, which we can easily test by making sure arm_aapcscc is used instead of arm_aapcs_vfpcc when the callee is variadic. llvm-svn: 351424
Diffstat (limited to 'llvm/lib/Target/ARM/ARMCallLowering.cpp')
-rw-r--r--llvm/lib/Target/ARM/ARMCallLowering.cpp7
1 files changed, 4 insertions, 3 deletions
diff --git a/llvm/lib/Target/ARM/ARMCallLowering.cpp b/llvm/lib/Target/ARM/ARMCallLowering.cpp
index 8e80c32bcf8..a64544c20d1 100644
--- a/llvm/lib/Target/ARM/ARMCallLowering.cpp
+++ b/llvm/lib/Target/ARM/ARMCallLowering.cpp
@@ -561,13 +561,14 @@ bool ARMCallLowering::lowerCall(MachineIRBuilder &MIRBuilder,
MIB.addRegMask(TRI->getCallPreservedMask(MF, CallConv));
+ bool IsVarArg = false;
SmallVector<ArgInfo, 8> ArgInfos;
for (auto Arg : OrigArgs) {
if (!isSupportedType(DL, TLI, Arg.Ty))
return false;
if (!Arg.IsFixed)
- return false;
+ IsVarArg = true;
if (Arg.Flags.isByVal())
return false;
@@ -581,7 +582,7 @@ bool ARMCallLowering::lowerCall(MachineIRBuilder &MIRBuilder,
MIRBuilder.buildUnmerge(Regs, Arg.Reg);
}
- auto ArgAssignFn = TLI.CCAssignFnForCall(CallConv, /*IsVarArg=*/false);
+ auto ArgAssignFn = TLI.CCAssignFnForCall(CallConv, IsVarArg);
OutgoingValueHandler ArgHandler(MIRBuilder, MRI, MIB, ArgAssignFn);
if (!handleAssignments(MIRBuilder, ArgInfos, ArgHandler))
return false;
@@ -600,7 +601,7 @@ bool ARMCallLowering::lowerCall(MachineIRBuilder &MIRBuilder,
SplitRegs.push_back(Reg);
});
- auto RetAssignFn = TLI.CCAssignFnForReturn(CallConv, /*IsVarArg=*/false);
+ auto RetAssignFn = TLI.CCAssignFnForReturn(CallConv, IsVarArg);
CallReturnHandler RetHandler(MIRBuilder, MRI, MIB, RetAssignFn);
if (!handleAssignments(MIRBuilder, ArgInfos, RetHandler))
return false;
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