File: 2008-07-02-array-indexing.ll

package info (click to toggle)
llvm-toolchain-13 1%3A13.0.1-6~deb11u1
  • links: PTS, VCS
  • area: main
  • in suites: bullseye
  • size: 1,418,812 kB
  • sloc: cpp: 5,290,827; ansic: 996,570; asm: 544,593; python: 188,212; objc: 72,027; lisp: 30,291; f90: 25,395; sh: 24,900; javascript: 9,780; pascal: 9,398; perl: 7,484; ml: 5,432; awk: 3,523; makefile: 2,892; xml: 953; cs: 573; fortran: 539
file content (43 lines) | stat: -rw-r--r-- 1,334 bytes parent folder | download | duplicates (5)
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
42
43
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --function-signature --scrub-attributes
; RUN: opt < %s -argpromotion -S | FileCheck %s
; PR2498

; This test tries to convince CHECK about promoting the load from %A + 2,
; because there is a load of %A in the entry block
define internal i32 @callee(i1 %C, i32* %A) {
; CHECK-LABEL: define {{[^@]+}}@callee
; CHECK-SAME: (i1 [[C:%.*]], i32* [[A:%.*]])
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[A_0:%.*]] = load i32, i32* [[A]]
; CHECK-NEXT:    br i1 [[C]], label [[T:%.*]], label [[F:%.*]]
; CHECK:       T:
; CHECK-NEXT:    ret i32 [[A_0]]
; CHECK:       F:
; CHECK-NEXT:    [[A_2:%.*]] = getelementptr i32, i32* [[A]], i32 2
; CHECK-NEXT:    [[R:%.*]] = load i32, i32* [[A_2]]
; CHECK-NEXT:    ret i32 [[R]]
;
entry:
  ; Unconditonally load the element at %A
  %A.0 = load i32, i32* %A
  br i1 %C, label %T, label %F

T:
  ret i32 %A.0

F:
  ; Load the element at offset two from %A. This should not be promoted!
  %A.2 = getelementptr i32, i32* %A, i32 2
  %R = load i32, i32* %A.2
  ret i32 %R
}

define i32 @foo() {
; CHECK-LABEL: define {{[^@]+}}@foo()
; CHECK-NEXT:    [[X:%.*]] = call i32 @callee(i1 false, i32* null)
; CHECK-NEXT:    ret i32 [[X]]
;
  %X = call i32 @callee(i1 false, i32* null)             ; <i32> [#uses=1]
  ret i32 %X
}