45 lines
670 B
LLVM
45 lines
670 B
LLVM
; RUN: opt < %s -lowerswitch -S | FileCheck %s
|
|
;
|
|
; The switch is lowered with a single icmp.
|
|
; CHECK: icmp
|
|
; CHECK-NOT: icmp
|
|
;
|
|
;int foo(int a) {
|
|
;
|
|
; switch (a) {
|
|
; case 0:
|
|
; return 10;
|
|
; case 1:
|
|
; return 3;
|
|
; default:
|
|
; __builtin_unreachable();
|
|
; }
|
|
;
|
|
;}
|
|
|
|
define i32 @foo(i32 %a) {
|
|
%1 = alloca i32, align 4
|
|
%2 = alloca i32, align 4
|
|
store i32 %a, i32* %2, align 4
|
|
%3 = load i32, i32* %2, align 4
|
|
switch i32 %3, label %6 [
|
|
i32 0, label %4
|
|
i32 1, label %5
|
|
]
|
|
|
|
; <label>:4
|
|
store i32 10, i32* %1
|
|
br label %7
|
|
|
|
; <label>:5
|
|
store i32 3, i32* %1
|
|
br label %7
|
|
|
|
; <label>:6
|
|
unreachable
|
|
|
|
; <label>:7
|
|
%8 = load i32, i32* %1
|
|
ret i32 %8
|
|
}
|