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e2cbc5b1c3
Allow it to have undef as an operand. This can happen when NoReturnFolding does RAUW for the instructions that come after a @noreturn function, replacing the uses of those instructions in blocks that are unreachable. These instructions end up getting deleted during diagnose unreachable when we remove the unreachable code. Fixes SR-967 / rdar://problem/25882880.
35 lines
999 B
Plaintext
35 lines
999 B
Plaintext
// RUN: %target-sil-opt -enable-sil-verify-all %s -diagnostics | FileCheck %s
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sil_stage raw
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import Builtin
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class TheClass {}
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// Ensure that when we remove the code after the apply of noreturn
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// function nada, we don't fail verification on a dealloc_stack with
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// an undef operand, but that we do later remove it in the diagnostics
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// passes.
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// CHECK-LABEL: sil @unreachable_dealloc_stack
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sil @unreachable_dealloc_stack: $@convention(method) (@guaranteed TheClass) -> () {
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bb0(%0 : $TheClass):
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%1 = function_ref @nada : $@convention(c) @noreturn (Builtin.Int32) -> ()
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%2 = integer_literal $Builtin.Int32, 0
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// CHECK: apply{{.*}}
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%3 = apply %1(%2) : $@convention(c) @noreturn (Builtin.Int32) -> ()
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// CHECK-NEXT: unreachable
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// CHECK-NOT: dealloc_stack
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%4 = alloc_stack $TheClass
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store %0 to %4 : $*TheClass
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br bb1
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bb1:
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dealloc_stack %4 : $*TheClass
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%5 = tuple ()
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return %5 : $()
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}
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// CHECK-LABEL: sil @nada
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sil @nada : $@convention(c) @noreturn (Builtin.Int32) -> ()
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