Files
wasmtime/cranelift/filetests/parser/branch.clif
Tyler McMullen 79cea5e18b Implement jump tables (#453)
* Add 'jump_table_entry' and 'indirect_jump' instructions.

* Update CodeSink to keep track of code size. Pretty up clif-util's disassembly output.

* Only disassemble the machine portion of output. Pretty print the read-only data after it.

* Update switch frontend code to use new br_table instruction w/ default.
2018-10-03 10:04:21 -07:00

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; Parsing branches and jumps.
test cat
; Jumps with no arguments. The '()' empty argument list is optional.
function %minimal() {
ebb0:
jump ebb1
ebb1:
jump ebb0()
}
; sameln: function %minimal() fast {
; nextln: ebb0:
; nextln: jump ebb1
; nextln:
; nextln: ebb1:
; nextln: jump ebb0
; nextln: }
; Jumps with 1 arg.
function %onearg(i32) {
ebb0(v90: i32):
jump ebb1(v90)
ebb1(v91: i32):
jump ebb0(v91)
}
; sameln: function %onearg(i32) fast {
; nextln: ebb0(v90: i32):
; nextln: jump ebb1(v90)
; nextln:
; nextln: ebb1(v91: i32):
; nextln: jump ebb0(v91)
; nextln: }
; Jumps with 2 args.
function %twoargs(i32, f32) {
ebb0(v90: i32, v91: f32):
jump ebb1(v90, v91)
ebb1(v92: i32, v93: f32):
jump ebb0(v92, v93)
}
; sameln: function %twoargs(i32, f32) fast {
; nextln: ebb0(v90: i32, v91: f32):
; nextln: jump ebb1(v90, v91)
; nextln:
; nextln: ebb1(v92: i32, v93: f32):
; nextln: jump ebb0(v92, v93)
; nextln: }
; Branches with no arguments. The '()' empty argument list is optional.
function %minimal(i32) {
ebb0(v90: i32):
brz v90, ebb1
ebb1:
brnz v90, ebb1()
}
; sameln: function %minimal(i32) fast {
; nextln: ebb0(v90: i32):
; nextln: brz v90, ebb1
; nextln:
; nextln: ebb1:
; nextln: brnz.i32 v90, ebb1
; nextln: }
function %twoargs(i32, f32) {
ebb0(v90: i32, v91: f32):
brz v90, ebb1(v90, v91)
ebb1(v92: i32, v93: f32):
brnz v90, ebb0(v92, v93)
}
; sameln: function %twoargs(i32, f32) fast {
; nextln: ebb0(v90: i32, v91: f32):
; nextln: brz v90, ebb1(v90, v91)
; nextln:
; nextln: ebb1(v92: i32, v93: f32):
; nextln: brnz.i32 v90, ebb0(v92, v93)
; nextln: }
function %jumptable(i32) {
jt200 = jump_table 0, 0
jt2 = jump_table 0, 0, ebb10, ebb40, ebb20, ebb30
ebb10(v3: i32):
br_table v3, ebb50, jt2
ebb20:
trap user2
ebb30:
trap user3
ebb40:
trap user4
ebb50:
trap user1
}
; sameln: function %jumptable(i32) fast {
; check: jt2 = jump_table 0, 0, ebb10, ebb40, ebb20, ebb30
; check: jt200 = jump_table 0
; check: ebb10(v3: i32):
; nextln: br_table v3, ebb50, jt2
; nextln:
; nextln: ebb20:
; nextln: trap user2
; nextln:
; nextln: ebb30:
; nextln: trap user3
; nextln:
; nextln: ebb40:
; nextln: trap user4
; nextln:
; nextln: ebb50:
; nextln: trap user1
; nextln: }