Files
wasmtime/cranelift/filetests/filetests/regalloc/unreachable_code.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outdated comment was also fixed.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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; Use "test compile" here otherwise the dead blocks won't be eliminated.
test compile
set enable_probestack=0
target x86_64 haswell
; This function contains unreachable blocks which trip up the register
; allocator if they don't get cleared out.
function %unreachable_blocks(i64 vmctx) -> i32 baldrdash_system_v {
block0(v0: i64):
v1 = iconst.i32 0
v2 = iconst.i32 0
jump block2
block2:
jump block4
block4:
jump block2
; Everything below this point is unreachable.
block3(v3: i32):
v5 = iadd.i32 v2, v3
jump block6
block6:
jump block6
block7(v6: i32):
v7 = iadd.i32 v5, v6
jump block8
block8:
jump block10
block10:
jump block8
block9(v8: i32):
v10 = iadd.i32 v7, v8
jump block1(v10)
block1(v11: i32):
return v11
}