forked from OSchip/llvm-project
XCore target: Add target specific EmitVAArg
This is so aggregates can be passed as var args too. llvm-svn: 188664
This commit is contained in:
Robert Lytton
parent
a7d1d865e5
commit
7d1db15ae1
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@ -5370,13 +5370,53 @@ public:
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// Xcore ABI Implementation
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//===----------------------------------------------------------------------===//
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namespace {
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class XCoreABIInfo : public DefaultABIInfo {
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public:
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XCoreABIInfo(CodeGen::CodeGenTypes &CGT) : DefaultABIInfo(CGT) {}
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virtual llvm::Value *EmitVAArg(llvm::Value *VAListAddr, QualType Ty,
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CodeGenFunction &CGF) const;
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};
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class XcoreTargetCodeGenInfo : public TargetCodeGenInfo {
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public:
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XcoreTargetCodeGenInfo(CodeGenTypes &CGT)
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:TargetCodeGenInfo(new DefaultABIInfo(CGT)) {}
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:TargetCodeGenInfo(new XCoreABIInfo(CGT)) {}
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};
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} // end anonymous namespace
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llvm::Value *XCoreABIInfo::EmitVAArg(llvm::Value *VAListAddr, QualType Ty,
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CodeGenFunction &CGF) const {
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ABIArgInfo AI = classifyArgumentType(Ty);
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CGBuilderTy &Builder = CGF.Builder;
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llvm::Type *ArgTy = CGT.ConvertType(Ty);
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if (AI.canHaveCoerceToType() && !AI.getCoerceToType())
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AI.setCoerceToType(ArgTy);
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// handle the VAList
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llvm::Value *VAListAddrAsBPP = Builder.CreateBitCast(VAListAddr,
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CGF.Int8PtrPtrTy);
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llvm::Value *AP = Builder.CreateLoad(VAListAddrAsBPP);
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llvm::Value *APN = Builder.CreateConstGEP1_32(AP, 4);
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Builder.CreateStore(APN, VAListAddrAsBPP);
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// handle the argument
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llvm::Type *ArgPtrTy = llvm::PointerType::getUnqual(ArgTy);
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switch (AI.getKind()) {
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default:
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case ABIArgInfo::Expand:
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llvm_unreachable("Unsupported ABI kind for va_arg");
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case ABIArgInfo::Ignore:
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return llvm::UndefValue::get(ArgPtrTy);
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case ABIArgInfo::Extend:
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case ABIArgInfo::Direct:
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return Builder.CreatePointerCast(AP, ArgPtrTy);
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case ABIArgInfo::Indirect:
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llvm::Value *ArgAddr;
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ArgAddr = Builder.CreateBitCast(AP, llvm::PointerType::getUnqual(ArgPtrTy));
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ArgAddr = Builder.CreateLoad(ArgAddr);
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return Builder.CreatePointerCast(ArgAddr, ArgPtrTy);
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}
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}
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//===----------------------------------------------------------------------===//
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// Driver code
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@ -9,22 +9,86 @@ int g1;
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int g2 __attribute__((common));
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#include <stdarg.h>
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struct x { int a; };
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struct x { int a[5]; };
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void f(void*);
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void testva (int n, ...) {
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// CHECK-LABEL: testva
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va_list ap;
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va_start(ap,n);
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// CHECK: [[AP:%[a-z0-9]+]] = alloca i8*, align 4
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// CHECK: [[AP1:%[a-z0-9]+]] = bitcast i8** [[AP]] to i8*
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// CHECK: call void @llvm.va_start(i8* [[AP1]])
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char* v1 = va_arg (ap, char*);
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// CHECK: va_arg i8** [[AP]], i8*
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f(v1);
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// CHECK: [[I:%[a-z0-9]+]] = load i8** [[AP]]
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// CHECK: [[IN:%[a-z0-9]+]] = getelementptr i8* [[I]], i32 4
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// CHECK: store i8* [[IN]], i8** [[AP]]
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// CHECK: [[P:%[a-z0-9]+]] = bitcast i8* [[I]] to i8**
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// CHECK: [[V1:%[a-z0-9]+]] = load i8** [[P]]
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// CHECK: store i8* [[V1]], i8** [[V:%[a-z0-9]+]], align 4
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// CHECK: [[V2:%[a-z0-9]+]] = load i8** [[V]], align 4
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// CHECK: call void @f(i8* [[V2]])
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int v2 = va_arg (ap, int);
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// CHECK: va_arg i8** [[AP]], i32
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char v2 = va_arg (ap, char);
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f(&v2);
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// CHECK: [[I:%[a-z0-9]+]] = load i8** [[AP]]
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// CHECK: [[IN:%[a-z0-9]+]] = getelementptr i8* [[I]], i32 4
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// CHECK: store i8* [[IN]], i8** [[AP]]
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// CHECK: [[V1:%[a-z0-9]+]] = load i8* [[I]]
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// CHECK: store i8 [[V1]], i8* [[V:%[a-z0-9]+]], align 1
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// CHECK: call void @f(i8* [[V]])
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long long int v3 = va_arg (ap, long long int);
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// CHECK: va_arg i8** [[AP]], i64
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int v3 = va_arg (ap, int);
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f(&v3);
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// CHECK: [[I:%[a-z0-9]+]] = load i8** [[AP]]
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// CHECK: [[IN:%[a-z0-9]+]] = getelementptr i8* [[I]], i32 4
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// CHECK: store i8* [[IN]], i8** [[AP]]
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// CHECK: [[P:%[a-z0-9]+]] = bitcast i8* [[I]] to i32*
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// CHECK: [[V1:%[a-z0-9]+]] = load i32* [[P]]
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// CHECK: store i32 [[V1]], i32* [[V:%[a-z0-9]+]], align 4
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// CHECK: [[V2:%[a-z0-9]+]] = bitcast i32* [[V]] to i8*
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// CHECK: call void @f(i8* [[V2]])
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//struct x t = va_arg (ap, struct x);
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//cannot compile aggregate va_arg expressions yet
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long long int v4 = va_arg (ap, long long int);
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f(&v4);
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// CHECK: [[I:%[a-z0-9]+]] = load i8** [[AP]]
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// CHECK: [[IN:%[a-z0-9]+]] = getelementptr i8* [[I]], i32 4
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// CHECK: store i8* [[IN]], i8** [[AP]]
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// CHECK: [[P:%[a-z0-9]+]] = bitcast i8* [[I]] to i64*
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// CHECK: [[V1:%[a-z0-9]+]] = load i64* [[P]]
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// CHECK: store i64 [[V1]], i64* [[V:%[a-z0-9]+]], align 8
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// CHECK:[[V2:%[a-z0-9]+]] = bitcast i64* [[V]] to i8*
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// CHECK: call void @f(i8* [[V2]])
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struct x v5 = va_arg (ap, struct x); // typical agregate type
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f(&v5);
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// CHECK: [[I:%[a-z0-9]+]] = load i8** [[AP]]
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// CHECK: [[IN:%[a-z0-9]+]] = getelementptr i8* [[I]], i32 4
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// CHECK: store i8* [[IN]], i8** [[AP]]
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// CHECK: [[I2:%[a-z0-9]+]] = bitcast i8* [[I]] to %struct.x**
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// CHECK: [[P:%[a-z0-9]+]] = load %struct.x** [[I2]]
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// CHECK: [[V1:%[a-z0-9]+]] = bitcast %struct.x* [[V:%[a-z0-9]+]] to i8*
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// CHECK: [[P1:%[a-z0-9]+]] = bitcast %struct.x* [[P]] to i8*
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// CHECK: call void @llvm.memcpy.p0i8.p0i8.i32(i8* [[V1]], i8* [[P1]], i32 20, i32 4, i1 false)
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// CHECK: [[V2:%[a-z0-9]+]] = bitcast %struct.x* [[V]] to i8*
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// CHECK: call void @f(i8* [[V2]])
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int* v6 = va_arg (ap, int[4]); // an unusual agregate type
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f(v6);
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// CHECK: [[I:%[a-z0-9]+]] = load i8** [[AP]]
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// CHECK: [[IN:%[a-z0-9]+]] = getelementptr i8* [[I]], i32 4
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// CHECK: store i8* [[IN]], i8** [[AP]]
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// CHECK: [[I2:%[a-z0-9]+]] = bitcast i8* [[I]] to [4 x i32]**
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// CHECK: [[P:%[a-z0-9]+]] = load [4 x i32]** [[I2]]
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// CHECK: [[V1:%[a-z0-9]+]] = bitcast [4 x i32]* [[V0:%[a-z0-9]+]] to i8*
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// CHECK: [[P1:%[a-z0-9]+]] = bitcast [4 x i32]* [[P]] to i8*
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// CHECK: call void @llvm.memcpy.p0i8.p0i8.i32(i8* [[V1]], i8* [[P1]], i32 16, i32 4, i1 false)
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// CHECK: [[V2:%[a-z0-9]+]] = getelementptr inbounds [4 x i32]* [[V0]], i32 0, i32 0
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// CHECK: store i32* [[V2]], i32** [[V:%[a-z0-9]+]], align 4
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// CHECK: [[V3:%[a-z0-9]+]] = load i32** [[V]], align 4
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// CHECK: [[V4:%[a-z0-9]+]] = bitcast i32* [[V3]] to i8*
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// CHECK: call void @f(i8* [[V4]])
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}
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void testbuiltin (void) {
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