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wasmtime/cranelift/filetests/licm/nested_loops.cton
Dan Gohman 6aeeaebbd3 Disallow branching to the entry block.
Functions that would otherwise start with a loop should start with a
separate ebb which just branches to the header of the loop.
2017-10-09 15:02:17 -07:00

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test licm
function %nested_loops(i32) -> i32 {
ebb0(v0: i32):
jump ebb1(v0)
ebb1(v1: i32):
v2 = iconst.i32 1
v3 = iconst.i32 2
v4 = iadd v2, v3
v5 = isub v1, v2
jump ebb2(v5, v5)
ebb2(v10: i32, v11: i32):
brz v11, ebb3(v10)
v12 = iconst.i32 1
v15 = iadd v12, v5
v13 = isub v11, v12
jump ebb2(v10,v13)
ebb3(v20: i32):
brz v20, ebb4(v20)
jump ebb1(v20)
ebb4(v30: i32):
return v30
}
; sameln:function %nested_loops(i32) -> i32 {
; nextln: ebb0(v0: i32):
; nextln: v2 = iconst.i32 1
; nextln: v3 = iconst.i32 2
; nextln: v4 = iadd v2, v3
; nextln: v8 = iconst.i32 1
; nextln: jump ebb1(v0)
; nextln:
; nextln: ebb1(v1: i32):
; nextln: v5 = isub v1, v2
; nextln: v9 = iadd.i32 v8, v5
; nextln: jump ebb2(v5, v5)
; nextln:
; nextln: ebb2(v6: i32, v7: i32):
; nextln: brz v7, ebb3(v6)
; nextln: v10 = isub v7, v8
; nextln: jump ebb2(v6, v10)
; nextln:
; nextln: ebb3(v11: i32):
; nextln: brz v11, ebb4(v11)
; nextln: jump ebb1(v11)
; nextln:
; nextln: ebb4(v12: i32):
; nextln: return v12
; nextln: }