vchuravy updated this revision to Diff 71936.
vchuravy added a comment.
Rebases the original changes and adds a test-case
https://reviews.llvm.org/D9168
Files:
lib/Target/NVPTX/NVPTXISelLowering.cpp
lib/Target/NVPTX/NVPTXISelLowering.h
test/CodeGen/NVPTX/zero-cs.ll
Index: test/CodeGen/NVPTX/zero-cs.ll
===================================================================
--- /dev/null
+++ test/CodeGen/NVPTX/zero-cs.ll
@@ -0,0 +1,9 @@
+; RUN: not llc < %s -march=nvptx 2>&1 | FileCheck %s
+
+; CHECK: LLVM ERROR: Cannot select: t7: i32 = ExternalSymbol'__powidf2'
+define double @powi() {
+ %1 = call double @llvm.powi.f64(double 1.000000e+00, i32 undef)
+ ret double %1
+}
+
+declare double @llvm.powi.f64(double, i32) nounwind readnone
Index: lib/Target/NVPTX/NVPTXISelLowering.h
===================================================================
--- lib/Target/NVPTX/NVPTXISelLowering.h
+++ lib/Target/NVPTX/NVPTXISelLowering.h
@@ -539,7 +539,7 @@
SDValue PerformDAGCombine(SDNode *N, DAGCombinerInfo &DCI) const override;
unsigned getArgumentAlignment(SDValue Callee, const ImmutableCallSite *CS,
- Type *Ty, unsigned Idx) const;
+ Type *Ty, unsigned Idx, const DataLayout &DL) const;
};
} // namespace llvm
Index: lib/Target/NVPTX/NVPTXISelLowering.cpp
===================================================================
--- lib/Target/NVPTX/NVPTXISelLowering.cpp
+++ lib/Target/NVPTX/NVPTXISelLowering.cpp
@@ -1028,48 +1028,50 @@
NVPTXTargetLowering::getArgumentAlignment(SDValue Callee,
const ImmutableCallSite *CS,
Type *Ty,
- unsigned Idx) const {
- unsigned Align = 0;
- const Value *DirectCallee = CS->getCalledFunction();
-
- if (!DirectCallee) {
- // We don't have a direct function symbol, but that may be because of
- // constant cast instructions in the call.
- const Instruction *CalleeI = CS->getInstruction();
- assert(CalleeI && "Call target is not a function or derived value?");
-
- // With bitcast'd call targets, the instruction will be the call
- if (isa<CallInst>(CalleeI)) {
- // Check if we have call alignment metadata
- if (llvm::getAlign(*cast<CallInst>(CalleeI), Idx, Align))
- return Align;
+ unsigned Idx,
+ const DataLayout &DL) const {
+ if (CS) {
+ unsigned Align = 0;
+ const Value *DirectCallee = CS->getCalledFunction();
+
+ if (!DirectCallee) {
+ // We don't have a direct function symbol, but that may be because of
+ // constant cast instructions in the call.
+ const Instruction *CalleeI = CS->getInstruction();
+ assert(CalleeI && "Call target is not a function or derived value?");
+
+ // With bitcast'd call targets, the instruction will be the call
+ if (isa<CallInst>(CalleeI)) {
+ // Check if we have call alignment metadata
+ if (llvm::getAlign(*cast<CallInst>(CalleeI), Idx, Align))
+ return Align;
+
+ const Value *CalleeV = cast<CallInst>(CalleeI)->getCalledValue();
+ // Ignore any bitcast instructions
+ while(isa<ConstantExpr>(CalleeV)) {
+ const ConstantExpr *CE = cast<ConstantExpr>(CalleeV);
+ if (!CE->isCast())
+ break;
+ // Look through the bitcast
+ CalleeV = cast<ConstantExpr>(CalleeV)->getOperand(0);
+ }
- const Value *CalleeV = cast<CallInst>(CalleeI)->getCalledValue();
- // Ignore any bitcast instructions
- while(isa<ConstantExpr>(CalleeV)) {
- const ConstantExpr *CE = cast<ConstantExpr>(CalleeV);
- if (!CE->isCast())
- break;
- // Look through the bitcast
- CalleeV = cast<ConstantExpr>(CalleeV)->getOperand(0);
+ // We have now looked past all of the bitcasts. Do we finally have a
+ // Function?
+ if (isa<Function>(CalleeV))
+ DirectCallee = CalleeV;
}
-
- // We have now looked past all of the bitcasts. Do we finally have a
- // Function?
- if (isa<Function>(CalleeV))
- DirectCallee = CalleeV;
}
- }
- // Check for function alignment information if we found that the
- // ultimate target is a Function
- if (DirectCallee)
- if (llvm::getAlign(*cast<Function>(DirectCallee), Idx, Align))
- return Align;
+ // Check for function alignment information if we found that the
+ // ultimate target is a Function
+ if (DirectCallee)
+ if (llvm::getAlign(*cast<Function>(DirectCallee), Idx, Align))
+ return Align;
+ }
// Call is indirect or alignment information is not available, fall back to
// the ABI type alignment
- auto &DL = CS->getCaller()->getParent()->getDataLayout();
return DL.getABITypeAlignment(Ty);
}
@@ -1126,7 +1128,7 @@
ComputePTXValueVTs(*this, DAG.getDataLayout(), Ty, vtparts, &Offsets,
0);
- unsigned align = getArgumentAlignment(Callee, CS, Ty, paramCount + 1);
+ unsigned align = getArgumentAlignment(Callee, CS, Ty, paramCount + 1, DL);
// declare .param .align <align> .b8 .param<n>[<size>];
unsigned sz = DL.getTypeAllocSize(Ty);
SDVTList DeclareParamVTs = DAG.getVTList(MVT::Other, MVT::Glue);
@@ -1166,7 +1168,7 @@
}
if (Ty->isVectorTy()) {
EVT ObjectVT = getValueType(DL, Ty);
- unsigned align = getArgumentAlignment(Callee, CS, Ty, paramCount + 1);
+ unsigned align = getArgumentAlignment(Callee, CS, Ty, paramCount + 1, DL);
// declare .param .align <align> .b8 .param<n>[<size>];
unsigned sz = DL.getTypeAllocSize(Ty);
SDVTList DeclareParamVTs = DAG.getVTList(MVT::Other, MVT::Glue);
@@ -1426,7 +1428,7 @@
DeclareRetOps);
InFlag = Chain.getValue(1);
} else {
- retAlignment = getArgumentAlignment(Callee, CS, retTy, 0);
+ retAlignment = getArgumentAlignment(Callee, CS, retTy, 0, DL);
SDVTList DeclareRetVTs = DAG.getVTList(MVT::Other, MVT::Glue);
SDValue DeclareRetOps[] = { Chain,
DAG.getConstant(retAlignment, dl, MVT::i32),
@@ -1633,9 +1635,10 @@
} else {
SmallVector<EVT, 16> VTs;
SmallVector<uint64_t, 16> Offsets;
- ComputePTXValueVTs(*this, DAG.getDataLayout(), retTy, VTs, &Offsets, 0);
+ auto &DL = DAG.getDataLayout();
+ ComputePTXValueVTs(*this, DL, retTy, VTs, &Offsets, 0);
assert(VTs.size() == Ins.size() && "Bad value decomposition");
- unsigned RetAlign = getArgumentAlignment(Callee, CS, retTy, 0);
+ unsigned RetAlign = getArgumentAlignment(Callee, CS, retTy, 0, DL);
for (unsigned i = 0, e = Ins.size(); i != e; ++i) {
unsigned sz = VTs[i].getSizeInBits();
unsigned AlignI = GreatestCommonDivisor64(RetAlign, Offsets[i]);
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