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|
; RUN: llc -O3 -o - %s | FileCheck %s
; Test that the output in the presence of an unreachable default does not have
; a compare and branch at the top of the switch to handle the default case.
target triple = "aarch64-unknown-linux-gnu"
; Function Attrs: nounwind
define void @fn(i4) {
switch i4 %0, label %default [
i4 0, label %case_0
i4 1, label %case_1
i4 2, label %case_2
i4 3, label %case_3
i4 4, label %case_4
i4 5, label %case_5
]
; CHECK-LABEL: fn:
; CHECK-NOT: sub
; CHECK-NOT: cmp
; CHECK-NOT: b.hi
; CHECK: ldr {{x[0-9]+}}, [{{x[0-9]+}}, {{x[0-9]+}}, lsl #3]
; CHECK: br {{x[0-9]+}}
default:
unreachable
case_0:
tail call void @handle_case_00(i4 %0) #2
br label %return_label
case_1:
tail call void @handle_case_01(i4 %0) #2
br label %return_label
case_2:
tail call void @handle_case_02(i4 %0) #2
br label %return_label
case_3:
tail call void @handle_case_03(i4 %0) #2
br label %return_label
case_4:
tail call void @handle_case_04(i4 %0) #2
br label %return_label
case_5:
tail call void @handle_case_05(i4 %0) #2
br label %return_label
return_label:
ret void
}
declare void @handle_case_00(i4)
declare void @handle_case_01(i4)
declare void @handle_case_02(i4)
declare void @handle_case_03(i4)
declare void @handle_case_04(i4)
declare void @handle_case_05(i4)
; RUN: llc -O3 -o - %s | FileCheck %s
; Test that the output in the presence of an unreachable default does not have
; a compare and branch at the top of the switch to handle the default case.
target triple = "aarch64-unknown-linux-gnu"
; Function Attrs: nounwind
define void @fn(i4) {
switch i4 %0, label %default [
i4 0, label %case_0
i4 1, label %case_1
i4 2, label %case_2
i4 3, label %case_3
i4 4, label %case_4
i4 5, label %case_5
]
; CHECK-LABEL: fn:
; CHECK-NOT: sub
; CHECK-NOT: cmp
; CHECK-NOT: b.hi
; CHECK: ldr {{x[0-9]+}}, [{{x[0-9]+}}, {{x[0-9]+}}, lsl #3]
; CHECK: br {{x[0-9]+}}
default:
unreachable
case_0:
tail call void @handle_case_00(i4 %0) #2
br label %return_label
case_1:
tail call void @handle_case_01(i4 %0) #2
br label %return_label
case_2:
tail call void @handle_case_02(i4 %0) #2
br label %return_label
case_3:
tail call void @handle_case_03(i4 %0) #2
br label %return_label
case_4:
tail call void @handle_case_04(i4 %0) #2
br label %return_label
case_5:
tail call void @handle_case_05(i4 %0) #2
br label %return_label
return_label:
ret void
}
declare void @handle_case_00(i4)
declare void @handle_case_01(i4)
declare void @handle_case_02(i4)
declare void @handle_case_03(i4)
declare void @handle_case_04(i4)
declare void @handle_case_05(i4)
|
