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[BPF] Remove exit-on-error flag in test (PR27766)

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The exit-on-error flag on the many_args1.ll test is needed to avoid an
unreachable in BPFTargetLowering::LowerCall. We can also avoid it by ignoring
any superfluous arguments to the call (i.e. any arguments after the first 5).

Fixes PR27766

llvm-svn: 270419
This commit is contained in:
Diana Picus 2016-05-23 12:33:34 +00:00
parent 14488dfcf0
commit 0a143f0f02
3 changed files with 9 additions and 5 deletions
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9
lib/Target/BPF/BPFISelLowering.cpp
View File

@ -209,6 +209,8 @@ SDValue BPFTargetLowering::LowerFormalArguments(
return Chain;
}
const unsigned long BPFTargetLowering::MaxArgs = 5;
SDValue BPFTargetLowering::LowerCall(TargetLowering::CallLoweringInfo &CLI,
SmallVectorImpl<SDValue> &InVals) const {
SelectionDAG &DAG = CLI.DAG;
@ -241,9 +243,8 @@ SDValue BPFTargetLowering::LowerCall(TargetLowering::CallLoweringInfo &CLI,
unsigned NumBytes = CCInfo.getNextStackOffset();
if (Outs.size() >= 6) {
if (Outs.size() > MaxArgs)
fail(CLI.DL, DAG, "too many args to ", Callee);
}
for (auto &Arg : Outs) {
ISD::ArgFlagsTy Flags = Arg.Flags;
@ -257,10 +258,10 @@ SDValue BPFTargetLowering::LowerCall(TargetLowering::CallLoweringInfo &CLI,
Chain = DAG.getCALLSEQ_START(
Chain, DAG.getConstant(NumBytes, CLI.DL, PtrVT, true), CLI.DL);
SmallVector<std::pair<unsigned, SDValue>, 5> RegsToPass;
SmallVector<std::pair<unsigned, SDValue>, MaxArgs> RegsToPass;
// Walk arg assignments
for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
for (unsigned i = 0, e = std::min(ArgLocs.size(), MaxArgs); i != e; ++i) {
CCValAssign &VA = ArgLocs[i];
SDValue Arg = OutVals[i];

3
lib/Target/BPF/BPFISelLowering.h
View File

@ -58,6 +58,9 @@ private:
SelectionDAG &DAG,
SmallVectorImpl<SDValue> &InVals) const;
// Maximum number of arguments to a call
static const unsigned long MaxArgs;
// Lower a call into CALLSEQ_START - BPFISD:CALL - CALLSEQ_END chain
SDValue LowerCall(TargetLowering::CallLoweringInfo &CLI,
SmallVectorImpl<SDValue> &InVals) const override;

2
test/CodeGen/BPF/many_args1.ll
View File

@ -1,4 +1,4 @@
; RUN: not llc -march=bpf -exit-on-error < %s 2> %t1
; RUN: not llc -march=bpf < %s 2> %t1
; RUN: FileCheck %s < %t1
; CHECK: too many args