File: switch-to-select-two-case.ll

package info (click to toggle)
llvm-toolchain-11 1%3A11.0.1-2
  • links: PTS, VCS
  • area: main
  • in suites: bullseye
  • size: 995,808 kB
  • sloc: cpp: 4,767,656; ansic: 760,916; asm: 477,436; python: 170,940; objc: 69,804; lisp: 29,914; sh: 23,855; f90: 18,173; pascal: 7,551; perl: 7,471; ml: 5,603; awk: 3,489; makefile: 2,573; xml: 915; cs: 573; fortran: 503; javascript: 452
file content (41 lines) | stat: -rw-r--r-- 938 bytes parent folder | download | duplicates (9) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
 
; RUN: opt < %s -simplifycfg -S | FileCheck %s

; int foo1_with_default(int a) {
;   switch(a) {
;     case 10:
;       return 10;
;     case 20:
;       return 2;
;   }
;   return 4;
; }

define i32 @foo1_with_default(i32 %a) {
; CHECK-LABEL: @foo1_with_default(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[SWITCH_SELECTCMP:%.*]] = icmp eq i32 %a, 20
; CHECK-NEXT:    [[SWITCH_SELECT:%.*]] = select i1 [[SWITCH_SELECTCMP:%.*]], i32 2, i32 4
; CHECK-NEXT:    [[SWITCH_SELECTCMP1:%.*]] = icmp eq i32 %a, 10
; CHECK-NEXT:    [[SWITCH_SELECT2:%.*]] = select i1 [[SWITCH_SELECTCMP1]], i32 10, i32 [[SWITCH_SELECT]]
; CHECK-NEXT:    ret i32 [[SWITCH_SELECT2]]
;
entry:
  switch i32 %a, label %sw.epilog [
  i32 10, label %sw.bb
  i32 20, label %sw.bb1
  ]

sw.bb:
  br label %return

sw.bb1:
  br label %return

sw.epilog:
  br label %return

return:
  %retval.0 = phi i32 [ 4, %sw.epilog ], [ 2, %sw.bb1 ], [ 10, %sw.bb ]
  ret i32 %retval.0
}