65 lines
1.1 KiB
LLVM
65 lines
1.1 KiB
LLVM
; RUN: opt %s -simplifycfg -S | FileCheck %s
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declare i32 @f(i32)
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define i32 @basic(i32 %x) {
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; CHECK-LABEL: @basic
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; CHECK-LABEL: entry:
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; CHECK-NEXT: call i32 @f(i32 0)
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; CHECK-NEXT: ret i32 %0
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entry:
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switch i32 %x, label %default [
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i32 5, label %default
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i32 6, label %default
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i32 7, label %default
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]
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default:
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%0 = call i32 @f(i32 0)
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ret i32 %0
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}
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define i32 @constant() {
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; CHECK-LABEL: @constant
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; CHECK-LABEL: entry:
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; CHECK-NEXT: call i32 @f(i32 1)
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; CHECK-NEXT: ret i32 %0
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entry:
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switch i32 42, label %default [
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i32 41, label %default
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i32 42, label %a
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i32 43, label %b
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]
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default:
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%0 = call i32 @f(i32 0)
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ret i32 %0
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a:
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%1 = call i32 @f(i32 1)
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ret i32 %1
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b:
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%2 = call i32 @f(i32 2)
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ret i32 %2
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}
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define i32 @unreachable(i32 %x) {
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; CHECK-LABEL: @unreachable
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; CHECK-LABEL: entry:
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; CHECK-NEXT: call i32 @f(i32 0)
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; CHECK-NEXT: ret i32 %0
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entry:
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switch i32 %x, label %unreachable [
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i32 5, label %a
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i32 6, label %a
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i32 7, label %a
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]
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unreachable:
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unreachable
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a:
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%0 = call i32 @f(i32 0)
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ret i32 %0
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}
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