46 lines
1.3 KiB
LLVM
46 lines
1.3 KiB
LLVM
; RUN: opt < %s -simplifycfg -switch-to-lookup -S -mtriple=x86_64-unknown-linux-gnu | FileCheck %s
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; In the presence of "-no-jump-tables"="true", simplifycfg should not convert switches to lookup tables.
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; CHECK: @switch.table.bar = private unnamed_addr constant [4 x i32] [i32 55, i32 123, i32 0, i32 -1]
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; CHECK-LABEL: foo
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; CHECK-NOT: @switch.table.foo = private unnamed_addr constant [4 x i32] [i32 55, i32 123, i32 0, i32 -1]
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define i32 @foo(i32 %c) "no-jump-tables"="true" {
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entry:
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switch i32 %c, label %sw.default [
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i32 42, label %return
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i32 43, label %sw.bb1
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i32 44, label %sw.bb2
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i32 45, label %sw.bb3
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]
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sw.bb1: br label %return
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sw.bb2: br label %return
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sw.bb3: br label %return
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sw.default: br label %return
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return:
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%retval.0 = phi i32 [ 15, %sw.default ], [ -1, %sw.bb3 ], [ 0, %sw.bb2 ], [ 123, %sw.bb1 ], [ 55, %entry ]
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ret i32 %retval.0
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}
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define i32 @bar(i32 %c) {
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entry:
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switch i32 %c, label %sw.default [
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i32 42, label %return
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i32 43, label %sw.bb1
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i32 44, label %sw.bb2
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i32 45, label %sw.bb3
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]
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sw.bb1: br label %return
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sw.bb2: br label %return
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sw.bb3: br label %return
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sw.default: br label %return
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return:
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%retval.0 = phi i32 [ 15, %sw.default ], [ -1, %sw.bb3 ], [ 0, %sw.bb2 ], [ 123, %sw.bb1 ], [ 55, %entry ]
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ret i32 %retval.0
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}
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