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[CodeGen][ARM] Make sure the value and type used to create a bitcast 

have the same size.

This fixes an asset that is triggered when an address of a boolean
variable is passed to __builtin_arm_ldrex or __builtin_arm_strex.

rdar://problem/29269006

llvm-svn: 288404
This commit is contained in:
Akira Hatanaka 2016-12-01 19:25:14 +00:00
parent 0134152cb4
commit 6c299ca6e7
2 changed files with 44 additions and 10 deletions
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30
clang/lib/CodeGen/CGBuiltin.cpp
View File

@ -4438,19 +4438,21 @@ Value *CodeGenFunction::EmitARMBuiltinExpr(unsigned BuiltinID,
QualType Ty = E->getType();
llvm::Type *RealResTy = ConvertType(Ty);
llvm::Type *IntResTy = llvm::IntegerType::get(getLLVMContext(),
getContext().getTypeSize(Ty));
LoadAddr = Builder.CreateBitCast(LoadAddr, IntResTy->getPointerTo());
llvm::Type *PtrTy = llvm::IntegerType::get(
getLLVMContext(), getContext().getTypeSize(Ty))->getPointerTo();
LoadAddr = Builder.CreateBitCast(LoadAddr, PtrTy);
Function *F = CGM.getIntrinsic(BuiltinID == ARM::BI__builtin_arm_ldaex
? Intrinsic::arm_ldaex
: Intrinsic::arm_ldrex,
LoadAddr->getType());
PtrTy);
Value *Val = Builder.CreateCall(F, LoadAddr, "ldrex");
if (RealResTy->isPointerTy())
return Builder.CreateIntToPtr(Val, RealResTy);
else {
llvm::Type *IntResTy = llvm::IntegerType::get(
getLLVMContext(), CGM.getDataLayout().getTypeSizeInBits(RealResTy));
Val = Builder.CreateTruncOrBitCast(Val, IntResTy);
return Builder.CreateBitCast(Val, RealResTy);
}
@ -4491,7 +4493,10 @@ Value *CodeGenFunction::EmitARMBuiltinExpr(unsigned BuiltinID,
if (StoreVal->getType()->isPointerTy())
StoreVal = Builder.CreatePtrToInt(StoreVal, Int32Ty);
else {
StoreVal = Builder.CreateBitCast(StoreVal, StoreTy);
llvm::Type *IntTy = llvm::IntegerType::get(
getLLVMContext(),
CGM.getDataLayout().getTypeSizeInBits(StoreVal->getType()));
StoreVal = Builder.CreateBitCast(StoreVal, IntTy);
StoreVal = Builder.CreateZExtOrBitCast(StoreVal, Int32Ty);
}
@ -5265,19 +5270,21 @@ Value *CodeGenFunction::EmitAArch64BuiltinExpr(unsigned BuiltinID,
QualType Ty = E->getType();
llvm::Type *RealResTy = ConvertType(Ty);
llvm::Type *IntResTy = llvm::IntegerType::get(getLLVMContext(),
getContext().getTypeSize(Ty));
LoadAddr = Builder.CreateBitCast(LoadAddr, IntResTy->getPointerTo());
llvm::Type *PtrTy = llvm::IntegerType::get(
getLLVMContext(), getContext().getTypeSize(Ty))->getPointerTo();
LoadAddr = Builder.CreateBitCast(LoadAddr, PtrTy);
Function *F = CGM.getIntrinsic(BuiltinID == AArch64::BI__builtin_arm_ldaex
? Intrinsic::aarch64_ldaxr
: Intrinsic::aarch64_ldxr,
LoadAddr->getType());
PtrTy);
Value *Val = Builder.CreateCall(F, LoadAddr, "ldxr");
if (RealResTy->isPointerTy())
return Builder.CreateIntToPtr(Val, RealResTy);
llvm::Type *IntResTy = llvm::IntegerType::get(
getLLVMContext(), CGM.getDataLayout().getTypeSizeInBits(RealResTy));
Val = Builder.CreateTruncOrBitCast(Val, IntResTy);
return Builder.CreateBitCast(Val, RealResTy);
}
@ -5316,7 +5323,10 @@ Value *CodeGenFunction::EmitAArch64BuiltinExpr(unsigned BuiltinID,
if (StoreVal->getType()->isPointerTy())
StoreVal = Builder.CreatePtrToInt(StoreVal, Int64Ty);
else {
StoreVal = Builder.CreateBitCast(StoreVal, StoreTy);
llvm::Type *IntTy = llvm::IntegerType::get(
getLLVMContext(),
CGM.getDataLayout().getTypeSizeInBits(StoreVal->getType()));
StoreVal = Builder.CreateBitCast(StoreVal, IntTy);
StoreVal = Builder.CreateZExtOrBitCast(StoreVal, Int64Ty);
}

24
clang/test/CodeGenCXX/builtins-arm-exclusive.cpp Normal file
View File

@ -0,0 +1,24 @@
// RUN: %clang_cc1 -Wall -Werror -triple thumbv8-linux-gnueabi -fno-signed-char -emit-llvm -o - %s | FileCheck %s
// RUN: %clang_cc1 -Wall -Werror -triple arm64-apple-ios7.0 -emit-llvm -o - %s | FileCheck %s --check-prefix=CHECK-ARM64
bool b;
// CHECK-LABEL: @_Z10test_ldrexv()
// CHECK: call i32 @llvm.arm.ldrex.p0i8(i8* @b)
// CHECK-ARM64-LABEL: @_Z10test_ldrexv()
// CHECK-ARM64: call i64 @llvm.aarch64.ldxr.p0i8(i8* @b)
void test_ldrex() {
b = __builtin_arm_ldrex(&b);
}
// CHECK-LABEL: @_Z10tset_strexv()
// CHECK: %{{.*}} = call i32 @llvm.arm.strex.p0i8(i32 1, i8* @b)
// CHECK-ARM64-LABEL: @_Z10tset_strexv()
// CHECK-ARM64: %{{.*}} = call i32 @llvm.aarch64.stxr.p0i8(i64 1, i8* @b)
void tset_strex() {
__builtin_arm_strex(true, &b);
}