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Replace LLVMConstInBoundsGEP with LLVMConstInBoundsGEP2*

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A custom reimplementation of LLVMConstInBoundsGEP2 is used, since the
LLVM contains a declaration of LLVMConstInBoundsGEP2 but not the
implementation.
This commit is contained in:
Tomasz Miąsko 2021-07-31 00:00:00 +00:00
parent 77e5e17231
commit 8e0df32ad6
3 changed files with 16 additions and 3 deletions
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6
compiler/rustc_codegen_llvm/src/common.rs
View File

@ -268,7 +268,8 @@ impl ConstMethods<'tcx> for CodegenCx<'ll, 'tcx> {
}
};
let llval = unsafe {
llvm::LLVMConstInBoundsGEP(
llvm::LLVMRustConstInBoundsGEP2(
self.type_i8(),
self.const_bitcast(base_addr, self.type_i8p_ext(base_addr_space)),
&self.const_usize(offset.bytes()),
1,
@ -303,7 +304,8 @@ impl ConstMethods<'tcx> for CodegenCx<'ll, 'tcx> {
let base_addr = self.static_addr_of(init, alloc.align, None);
let llval = unsafe {
llvm::LLVMConstInBoundsGEP(
llvm::LLVMRustConstInBoundsGEP2(
self.type_i8(),
self.const_bitcast(base_addr, self.type_i8p()),
&self.const_usize(offset.bytes()),
1,

3
compiler/rustc_codegen_llvm/src/llvm/ffi.rs
View File

@ -1011,7 +1011,8 @@ extern "C" {
pub fn LLVMConstVector(ScalarConstantVals: *const &Value, Size: c_uint) -> &Value;
// Constant expressions
pub fn LLVMConstInBoundsGEP(
pub fn LLVMRustConstInBoundsGEP2(
ty: &'a Type,
ConstantVal: &'a Value,
ConstantIndices: *const &'a Value,
NumIndices: c_uint,

10
compiler/rustc_llvm/llvm-wrapper/RustWrapper.cpp
View File

@ -1551,6 +1551,16 @@ extern "C" void LLVMRustSetLinkage(LLVMValueRef V,
LLVMSetLinkage(V, fromRust(RustLinkage));
}
extern "C" LLVMValueRef LLVMRustConstInBoundsGEP2(LLVMTypeRef Ty,
LLVMValueRef ConstantVal,
LLVMValueRef *ConstantIndices,
unsigned NumIndices) {
ArrayRef<Constant *> IdxList(unwrap<Constant>(ConstantIndices, NumIndices),
NumIndices);
Constant *Val = unwrap<Constant>(ConstantVal);
return wrap(ConstantExpr::getInBoundsGetElementPtr(unwrap(Ty), Val, IdxList));
}
// Returns true if both high and low were successfully set. Fails in case constant wasn’t any of
// the common sizes (1, 8, 16, 32, 64, 128 bits)
extern "C" bool LLVMRustConstInt128Get(LLVMValueRef CV, bool sext, uint64_t *high, uint64_t *low)