cee00c6591
The BranchTarget abstraction is no longer needed, since all branches are being emitted using a MachLabel target. Remove BranchTarget and simply use MachLabel everywhere a branch target is required. (This brings the s390x back-end in line with what x64 does as well.) In addition, simplify jumptable emission by moving all instructions that do not depend on the internal label (i.e. the conditional branch to the default label, as well as the scaling the index register) out of the combined JTSequence instruction. This refactoring will make moving branch generation to ISLE easier.
52 lines
753 B
Plaintext
52 lines
753 B
Plaintext
test compile
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target s390x
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function %f(i64) -> i64 {
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jt0 = jump_table [block1, block2, block3]
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block0(v0: i64):
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br_table v0, block4, jt0
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block1:
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v1 = iconst.i64 1
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jump block5(v1)
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block2:
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v2 = iconst.i64 2
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jump block5(v2)
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block3:
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v3 = iconst.i64 3
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jump block5(v3)
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block4:
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v4 = iconst.i64 4
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jump block5(v4)
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block5(v5: i64):
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v6 = iadd.i64 v0, v5
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return v6
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}
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; check: clgfi %r2, 3
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; nextln: jghe label1
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; nextln: sllg %r3, %r2, 2
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; nextln: larl %r1, 14 ; agf %r1, 0(%r1, %r3) ; br %r1 ; jt_entries label3 label5 label7
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; check: Block 3
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; check: lghi %r3, 1
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; nextln: jg
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; check: Block 5
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; check: lghi %r3, 2
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; nextln: jg
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; check: Block 7
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; check: lghi %r3, 3
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; nextln: jg
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; check: agr %r2, %r3
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; nextln: br %r14
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