Files
wasmtime/cranelift/filetests/filetests/regalloc/infinite-interference.clif
Ryan Hunt 832666c45e Mass rename Ebb and relatives to Block (#1365)
* Manually rename BasicBlock to BlockPredecessor

BasicBlock is a pair of (Ebb, Inst) that is used to represent the
basic block subcomponent of an Ebb that is a predecessor to an Ebb.

Eventually we will be able to remove this struct, but for now it
makes sense to give it a non-conflicting name so that we can start
to transition Ebb to represent a basic block.

I have not updated any comments that refer to BasicBlock, as
eventually we will remove BlockPredecessor and replace with Block,
which is a basic block, so the comments will become correct.

* Manually rename SSABuilder block types to avoid conflict

SSABuilder has its own Block and BlockData types. These along with
associated identifier will cause conflicts in a later commit, so
they are renamed to be more verbose here.

* Automatically rename 'Ebb' to 'Block' in *.rs

* Automatically rename 'EBB' to 'block' in *.rs

* Automatically rename 'ebb' to 'block' in *.rs

* Automatically rename 'extended basic block' to 'basic block' in *.rs

* Automatically rename 'an basic block' to 'a basic block' in *.rs

* Manually update comment for `Block`

`Block`'s wikipedia article required an update.

* Automatically rename 'an `Block`' to 'a `Block`' in *.rs

* Automatically rename 'extended_basic_block' to 'basic_block' in *.rs

* Automatically rename 'ebb' to 'block' in *.clif

* Manually rename clif constant that contains 'ebb' as substring to avoid conflict

* Automatically rename filecheck uses of 'EBB' to 'BB'

'regex: EBB' -> 'regex: BB'
'$EBB' -> '$BB'

* Automatically rename 'EBB' 'Ebb' to 'block' in *.clif

* Automatically rename 'an block' to 'a block' in *.clif

* Fix broken testcase when function name length increases

Test function names are limited to 16 characters. This causes
the new longer name to be truncated and fail a filecheck test. An
outdated comment was also fixed.
2020-02-07 10:46:47 -06:00

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test regalloc
target riscv32
; Here, the coalescer initially builds vreg0 = [v1, v2, v3]
;
; There's interference between v1 and v2 at the brz instruction. Isolating v2 is not going to
; resolve that conflict since v1 will just interfere with the inserted copy too.
;function %c1(i32) -> i32 {
;block0(v0: i32):
; v1 = iadd_imm v0, 1
; v2 = iconst.i32 1
; brz v1, block1(v2)
; jump block2
;
;block1(v3: i32):
; return v3
;
;block2:
; jump block1(v1)
;}
; Same thing with v1 and v2 swapped to reverse the order of definitions.
function %c2(i32) -> i32 {
block0(v0: i32):
v1 = iadd_imm v0, 1
v2 = iconst.i32 1
brz v2, block1(v1)
jump block2
block1(v3: i32):
return v3
block2:
jump block1(v2)
}