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48ee212303
rdar://149985633 Using at least Int8 here allows LLVM to apply more optimizations, reducing code size, avoiding stack allocations and as a result often eliminating complete stack frames.
57 lines
2.1 KiB
Plaintext
57 lines
2.1 KiB
Plaintext
// RUN: %target-swift-frontend %s -emit-ir | %FileCheck %s --check-prefix=CHECK-%target-ptrsize
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// REQUIRES: CPU=i386 || CPU=x86_64
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sil_stage canonical
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import Builtin
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enum ManyEmptyCases {
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case A
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case B
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case C(Builtin.Int32)
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}
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// CHECK-LABEL-64: define{{( protected)?}} swiftcc i1 @select_enum_A(i64)
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// CHECK-64: %2 = load i32, ptr %temp-coercion.coerced
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// CHECK-64: %4 = load i8, ptr %3
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// CHECK-64: [[PAYLOAD:%.*]] = icmp eq i32 %2, 0
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// CHECK-64: [[TAG_TRUNC:%.*]] = icmp eq i8 %4, 1
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// CHECK-64: [[EXTRA:%.*]] = and i1 [[TAG_TRUNC]], [[PAYLOAD]]
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// CHECK-64: ret i1 [[EXTRA]]
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// CHECK-LABEL-32: define{{( protected)?}} swiftcc i1 @select_enum_A(i32, i8) {{.*}}{
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// CHECK-32: entry:
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// CHECK-32: %2 = trunc i8 %1 to i1
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// CHECK-32: %3 = icmp eq i32 %0, 0
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// CHECK-32: %4 = and i1 %2, %3
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// CHECK-32: ret i1 %4
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sil @select_enum_A : $@convention(thin) (ManyEmptyCases) -> Builtin.Int1 {
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entry(%0 : $ManyEmptyCases):
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%4 = integer_literal $Builtin.Int1, -1 // user: %6
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%5 = integer_literal $Builtin.Int1, 0 // user: %6
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%6 = select_enum %0 : $ManyEmptyCases, case #ManyEmptyCases.A!enumelt: %4, default %5 : $Builtin.Int1
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return %6 : $Builtin.Int1
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}
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// CHECK-LABEL-64: define{{( protected)?}} swiftcc i1 @select_enum_B(i64)
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// CHECK-64: %2 = load i32, ptr %temp-coercion.coerced
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// CHECK-64: %4 = load i8, ptr %3
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// CHECK-64: [[PAYLOAD:%.*]] = icmp eq i32 %2, 1
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// CHECK-64: [[TAG_TRUNC:%.*]] = icmp eq i8 %4, 1
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// CHECK-64: [[EXTRA:%.*]] = and i1 [[TAG_TRUNC]], [[PAYLOAD]]
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// CHECK-64: ret i1 [[EXTRA]]
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// CHECK-LABEL-32: define{{( protected)?}} swiftcc i1 @select_enum_A(i32, i8) {{.*}}{
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// CHECK-32: entry:
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// CHECK-32: %2 = trunc i8 %1 to i1
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// CHECK-32: %3 = icmp eq i32 %0, 1
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// CHECK-32: %4 = and i1 %2, %3
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// CHECK-32: ret i1 %4
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sil @select_enum_B : $@convention(thin) (ManyEmptyCases) -> Builtin.Int1 {
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entry(%0 : $ManyEmptyCases):
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%4 = integer_literal $Builtin.Int1, -1 // user: %6
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%5 = integer_literal $Builtin.Int1, 0 // user: %6
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%6 = select_enum %0 : $ManyEmptyCases, case #ManyEmptyCases.B!enumelt: %4, default %5 : $Builtin.Int1
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return %6 : $Builtin.Int1
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}
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