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52 lines
1.0 KiB
Plaintext
52 lines
1.0 KiB
Plaintext
// RUN: %target-sil-opt -assume-parsing-unqualified-ownership-sil -enable-sil-verify-all %s -simplify-cfg -cse | %FileCheck %s
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// Test if jump-threading is done to combine two enum instructions
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// into a single block.
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sil_stage canonical
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import Builtin
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enum E {
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case A
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case B
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}
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enum E2 {
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case X
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case Y(E)
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}
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// CHECK-LABEL: sil @testfunc
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sil @testfunc : $@convention(thin) (Builtin.Int1, Builtin.Int1) -> E2 {
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bb0(%0 : $Builtin.Int1, %1 : $Builtin.Int1):
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cond_br %0, bb1, bb4
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bb1:
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%2 = enum $E, #E.A!enumelt
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cond_br %1, bb2, bb3(%2 : $E)
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// CHECK: [[ENUM1:%[0-9]+]] = enum $E, #E.B
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// CHECK-NEXT: [[ENUM2:%[0-9]+]] = enum $E2, #E2.Y!enumelt.1, [[ENUM1]]
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// CHECK-NEXT: br [[RETBB:bb[0-9]+]]([[ENUM2]] : $E2)
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bb2:
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// This block should be jump-threaded
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%3 = enum $E, #E.B!enumelt
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br bb3(%3 : $E)
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bb3(%4 : $E):
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%5 = enum $E2, #E2.Y!enumelt.1, %4 : $E
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br bb5(%5 : $E2)
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bb4:
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%6 = enum $E2, #E2.X!enumelt
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br bb5(%6 : $E2)
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// CHECK: [[RETBB]]({{.*}}):
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// CHECK-NEXT: return
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bb5(%7 : $E2):
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return %7 : $E2
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}
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