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TheRock/compiler/amd-llvm/llvm/test/Transforms/SimplifyCFG/ARM/switch-to-lookup-table-constant-expr.ll
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derek.holloway 7502bf64a4
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Flatten subprojects into a single base monorepo
2026-09-02 16:34:47 -07:00

57 lines
1.8 KiB
LLVM

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -S -passes=simplifycfg -simplifycfg-require-and-preserve-domtree=1 < %s | FileCheck %s
target datalayout = "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64"
target triple = "armv7a--none-eabi"
; One of the phi node's values is too complex to be represented by a global
; variable, so we can't convert to a lookup table.
@g1 = external global i32, align 4
@g2 = external global i32, align 4
@g3 = external global i32, align 4
@g4 = external thread_local global i32, align 4
define ptr @test3(i32 %n) {
; CHECK-LABEL: @test3(
; CHECK-NEXT: entry:
; CHECK-NEXT: switch i32 [[N:%.*]], label [[SW_DEFAULT:%.*]] [
; CHECK-NEXT: i32 0, label [[RETURN:%.*]]
; CHECK-NEXT: i32 1, label [[SW_BB1:%.*]]
; CHECK-NEXT: i32 2, label [[SW_BB2:%.*]]
; CHECK-NEXT: ]
; CHECK: sw.bb1:
; CHECK-NEXT: br label [[RETURN]]
; CHECK: sw.bb2:
; CHECK-NEXT: br label [[RETURN]]
; CHECK: sw.default:
; CHECK-NEXT: br label [[RETURN]]
; CHECK: return:
; CHECK-NEXT: [[RETVAL_0:%.*]] = phi ptr [ @g4, [[SW_DEFAULT]] ], [ getelementptr inbounds (i32, ptr inttoptr (i32 add (i32 ptrtoint (ptr @g3 to i32), i32 2) to ptr), i32 1), [[SW_BB2]] ], [ @g2, [[SW_BB1]] ], [ @g1, [[ENTRY:%.*]] ]
; CHECK-NEXT: ret ptr [[RETVAL_0]]
;
entry:
switch i32 %n, label %sw.default [
i32 0, label %sw.bb
i32 1, label %sw.bb1
i32 2, label %sw.bb2
]
sw.bb:
br label %return
sw.bb1:
br label %return
sw.bb2:
br label %return
sw.default:
br label %return
return:
%retval.0 = phi ptr [ @g4, %sw.default ], [ getelementptr inbounds (i32, ptr inttoptr (i32 add (i32 ptrtoint (ptr @g3 to i32), i32 2) to ptr), i32 1), %sw.bb2 ], [ @g2, %sw.bb1 ], [ @g1, %sw.bb ]
ret ptr %retval.0
}