rust/compiler/rustc_codegen_ssa/src/mir/place.rs, branch 1.52.0

PlaceRef::ty: use method call syntax

2021-01-16T10:38:14+00:00

Auto merge of #80200 - mahkoh:dst-offset, r=nagisa

2021-01-07T03:13:21+00:00

Optimize DST field access For struct X(T) struct Y(u8, T) the offset of the unsized field is 0 mem::align_of_val(&self.1) respectively. This patch changes the expression used to compute these offsets so that the optimizer can perform this optimization. Consider ```rust fn f(x: &X) -> &dyn Any { &x.0 } ``` Before: ```asm test: movq %rsi, %rdx movq 16(%rsi), %rax leaq -1(%rax), %rcx negq %rax andq %rcx, %rax addq %rdi, %rax retq ``` After: ```asm test: movq %rsi, %rdx movq %rdi, %rax retq ```

use PlaceRef more consistently instead of loosely coupled local+projection

2021-01-03T13:14:55+00:00

Optimize DST field access

2020-12-19T19:43:15+00:00

For struct X(T) struct Y(u8, T) the offset of the unsized field is 0 mem::align_of_val(&self.1) respectively. This patch changes the expression used to compute these offsets so that the optimizer can perform this optimization. Consider ```rust fn test(x: &X) -> &dyn Any { &x.0 } ``` Before: ```asm test: movq %rsi, %rdx movq 16(%rsi), %rax leaq -1(%rax), %rcx negq %rax andq %rcx, %rax addq %rdi, %rax retq ``` After: ```asm test: movq %rsi, %rdx movq %rdi, %rax retq ```

compiler: fold by value

2020-11-16T21:34:57+00:00

Replace target.target with target and target.ptr_width with target.pointer_width

2020-10-15T10:02:24+00:00

Preparation for a subsequent change that replaces rustc_target::config::Config with its wrapped Target. On its own, this commit breaks the build. I don't like making build-breaking commits, but in this instance I believe that it makes review easier, as the "real" changes of this PR can be seen much more easily. Result of running: find compiler/ -type f -exec sed -i -e 's/target\.target$[)\.,; ]$/target\1/g' {} \; find compiler/ -type f -exec sed -i -e 's/target\.target$/target/g' {} \; find compiler/ -type f -exec sed -i -e 's/target.ptr_width/target.pointer_width/g' {} \; ./x.py fmt

Auto merge of #73453 - erikdesjardins:tuplayout, r=eddyb

2020-09-25T14:42:20+00:00

Ignore ZST offsets when deciding whether to use Scalar/ScalarPair layout This is important because Scalar/ScalarPair layout previously would not be used if any ZST had nonzero offset. For example, before this change, only `((), u128)` would be laid out like `u128`, not `(u128, ())`. Fixes #63244

Change ty.kind to a method

2020-09-04T15:47:51+00:00

handle vector layout

2020-08-30T18:58:03+00:00

ignore zst offsets instead

2020-08-30T18:58:03+00:00