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Add some tests for SimplifyCFG's TurnSwitchRangeIntoICmp(). NFC.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@223396 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Hans Wennborg 2014-12-04 22:19:28 +00:00
parent 8de6d3e510
commit 76b1313e75
1 changed files with 50 additions and 0 deletions
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50
test/Transforms/SimplifyCFG/switch-range-to-icmp.ll Normal file
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; RUN: opt %s -simplifycfg -S | FileCheck %s
declare i32 @f(i32)
define i32 @basic(i32 %x) {
; CHECK-LABEL: @basic
; CHECK: x.off = add i32 %x, -5
; CHECK: %switch = icmp ult i32 %x.off, 3
; CHECK: br i1 %switch, label %a, label %default
entry:
switch i32 %x, label %default [
i32 5, label %a
i32 6, label %a
i32 7, label %a
]
default:
%0 = call i32 @f(i32 0)
ret i32 %0
a:
%1 = call i32 @f(i32 1)
ret i32 %1
}
define i32 @unreachable(i32 %x) {
; CHECK-LABEL: @unreachable
; CHECK: x.off = add i32 %x, -5
; CHECK: %switch = icmp ult i32 %x.off, 3
; CHECK: br i1 %switch, label %a, label %b
entry:
switch i32 %x, label %unreachable [
i32 5, label %a
i32 6, label %a
i32 7, label %a
i32 10, label %b
i32 20, label %b
i32 30, label %b
i32 40, label %b
]
unreachable:
unreachable
a:
%0 = call i32 @f(i32 0)
ret i32 %0
b:
%1 = call i32 @f(i32 1)
ret i32 %1
}