File: rle-semidominated.ll

package info (click to toggle)
llvm-toolchain-13 1%3A13.0.1-11
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 1,418,840 kB
  • sloc: cpp: 5,290,826; ansic: 996,570; asm: 544,593; python: 188,212; objc: 72,027; lisp: 30,291; f90: 25,395; sh: 24,898; javascript: 9,780; pascal: 9,398; perl: 7,484; ml: 5,432; awk: 3,523; makefile: 2,913; xml: 953; cs: 573; fortran: 539
file content (36 lines) | stat: -rw-r--r-- 890 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
 
; RUN: opt < %s -basic-aa -gvn -S | FileCheck %s

define i32 @main(i32* %p, i32 %x, i32 %y) {
block1:
  %z = load i32, i32* %p
  %cmp = icmp eq i32 %x, %y
	br i1 %cmp, label %block2, label %block3

block2:
 br label %block4

block3:
  %b = bitcast i32 0 to i32
  store i32 %b, i32* %p
  br label %block4

block4:
  %DEAD = load i32, i32* %p
  ret i32 %DEAD
}

; CHECK: define i32 @main(i32* %p, i32 %x, i32 %y) {
; CHECK-NEXT: block1:
; CHECK-NOT:    %z = load i32, i32* %p
; CHECK-NEXT:   %cmp = icmp eq i32 %x, %y
; CHECK-NEXT:   br i1 %cmp, label %block2, label %block3
; CHECK: block2:
; CHECK-NEXT:   %DEAD.pre = load i32, i32* %p
; CHECK-NEXT:   br label %block4
; CHECK: block3:
; CHECK-NEXT:   store i32 0, i32* %p
; CHECK-NEXT:   br label %block4
; CHECK: block4:
; CHECK-NEXT:   %DEAD = phi i32 [ 0, %block3 ], [ %DEAD.pre, %block2 ]
; CHECK-NEXT:   ret i32 %DEAD
; CHECK-NEXT: }