bjoernager/rust
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Pass type when creating load

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This makes load generation compatible with opaque pointers.

The generation of nontemporal copies still accesses the pointer
element type, as fixing this requires more movement.
This commit is contained in:
Nikita Popov 2021-07-04 18:53:04 +02:00
parent 33e9a6b565
commit 4560efe46c
10 changed files with 65 additions and 52 deletions
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19
compiler/rustc_codegen_llvm/src/intrinsic.rs
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@ -162,11 +162,14 @@ impl IntrinsicCallMethods<'tcx> for Builder<'a, 'll, 'tcx> {
sym::volatile_load | sym::unaligned_volatile_load => {
let tp_ty = substs.type_at(0);
let mut ptr = args[0].immediate();
if let PassMode::Cast(ty) = fn_abi.ret.mode {
ptr = self.pointercast(ptr, self.type_ptr_to(ty.llvm_type(self)));
}
let load = self.volatile_load(ptr);
let ptr = args[0].immediate();
let load = if let PassMode::Cast(ty) = fn_abi.ret.mode {
let llty = ty.llvm_type(self);
let ptr = self.pointercast(ptr, self.type_ptr_to(llty));
self.volatile_load(llty, ptr)
} else {
self.volatile_load(self.layout_of(tp_ty).llvm_type(self), ptr)
};
let align = if name == sym::unaligned_volatile_load {
1
} else {
@ -319,9 +322,9 @@ impl IntrinsicCallMethods<'tcx> for Builder<'a, 'll, 'tcx> {
let integer_ty = self.type_ix(layout.size.bits());
let ptr_ty = self.type_ptr_to(integer_ty);
let a_ptr = self.bitcast(a, ptr_ty);
let a_val = self.load(a_ptr, layout.align.abi);
let a_val = self.load(integer_ty, a_ptr, layout.align.abi);
let b_ptr = self.bitcast(b, ptr_ty);
let b_val = self.load(b_ptr, layout.align.abi);
let b_val = self.load(integer_ty, b_ptr, layout.align.abi);
self.icmp(IntPredicate::IntEQ, a_val, b_val)
} else {
let i8p_ty = self.type_i8p();
@ -540,7 +543,7 @@ fn codegen_msvc_try(
// Source: MicrosoftCXXABI::getAddrOfCXXCatchHandlerType in clang
let flags = bx.const_i32(8);
let funclet = catchpad_rust.catch_pad(cs, &[tydesc, flags, slot]);
let ptr = catchpad_rust.load(slot, ptr_align);
let ptr = catchpad_rust.load(bx.type_i8p(), slot, ptr_align);
catchpad_rust.call(catch_func, &[data, ptr], Some(&funclet));
catchpad_rust.catch_ret(&funclet, caught.llbb());