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e14db7cede
Summary:
We use `variable_ops` in the tablegen defs to denote the list of
branch targets in `br_table`, but unlike other uses of `variable_ops`
(e.g. call) the these branch targets need to actually be encoded in the
instruction. The existing tables for `variable_ops` cause not operands
to be accepted by the assembly matcher.
Following the example of ARM:
2cc0a7da87/lib/Target/ARM/ARMInstrInfo.td (L550-L555)
we introduce a new operand type to capture this list, and we use the
same {} syntax as ARM as well to differentiate them from regular
integer operands.
Also removed definition and use of TSFlags in tablegen defs, since
`br_table` now has a non-variable_ops immediate operand, so the
previous logic of only the variable_ops arguments being labels didn't
make sense anymore.
Reviewers: dschuff, aheejin, sunfish
Subscribers: javed.absar, sbc100, jgravelle-google, kristof.beyls, llvm-commits
Differential Revision: https://reviews.llvm.org/D55401
llvm-svn: 349405
32 lines
905 B
LLVM
32 lines
905 B
LLVM
; RUN: llc < %s -asm-verbose=false -disable-wasm-fallthrough-return-opt -disable-block-placement -verify-machineinstrs | FileCheck %s
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target datalayout = "e-m:e-p:32:32-i64:64-n32:64-S128"
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target triple = "wasm32-unknown-unknown"
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declare void @foo0()
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declare void @foo1()
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; Tests if br_table is printed correctly with a tab.
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; CHECK-LABEL: test0:
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; CHECK: br_table {0, 1, 0, 1, 0}
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define void @test0(i32 %n) {
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entry:
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switch i32 %n, label %sw.epilog [
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i32 0, label %sw.bb
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i32 1, label %sw.bb.1
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i32 2, label %sw.bb
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i32 3, label %sw.bb.1
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]
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sw.bb: ; preds = %entry, %entry
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tail call void @foo0()
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br label %sw.epilog
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sw.bb.1: ; preds = %entry, %entry
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tail call void @foo1()
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br label %sw.epilog
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sw.epilog: ; preds = %entry, %sw.bb, %sw.bb.1
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ret void
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}
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