reference, declarationdefinition
definition → references, declarations, derived classes, virtual overrides
reference to multiple definitions → definitions
unreferenced
    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
   44
   45
   46
   47
   48
; RUN: llc -mtriple=thumbv4t-none--eabi < %s | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-V4T
; RUN: llc -mtriple=thumbv6m-none--eabi < %s | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-V6M

; CHECK-LABEL: test1
define i32 @test1(i32* %p) {

; Offsets less than 8 can be generated in a single add
; CHECK: adds [[NEWBASE:r[0-9]]], r0, #4
  %1 = getelementptr inbounds i32, i32* %p, i32 1
  %2 = getelementptr inbounds i32, i32* %p, i32 2
  %3 = getelementptr inbounds i32, i32* %p, i32 3
  %4 = getelementptr inbounds i32, i32* %p, i32 4

; CHECK-NEXT: ldm [[NEWBASE]],
  %5 = load i32, i32* %1, align 4
  %6 = load i32, i32* %2, align 4
  %7 = load i32, i32* %3, align 4
  %8 = load i32, i32* %4, align 4

  %9 = add nsw i32 %5, %6
  %10 = add nsw i32 %9, %7
  %11 = add nsw i32 %10, %8
  ret i32 %11
}

; CHECK-LABEL: test2
define i32 @test2(i32* %p) {

; Offsets >=8 require a mov and an add
; CHECK-V4T:  movs [[NEWBASE:r[0-9]]], r0
; CHECK-V6M:  mov [[NEWBASE:r[0-9]]], r0
; CHECK-NEXT: adds [[NEWBASE]], #8
  %1 = getelementptr inbounds i32, i32* %p, i32 2
  %2 = getelementptr inbounds i32, i32* %p, i32 3
  %3 = getelementptr inbounds i32, i32* %p, i32 4
  %4 = getelementptr inbounds i32, i32* %p, i32 5

; CHECK-NEXT: ldm [[NEWBASE]],
  %5 = load i32, i32* %1, align 4
  %6 = load i32, i32* %2, align 4
  %7 = load i32, i32* %3, align 4
  %8 = load i32, i32* %4, align 4

  %9 = add nsw i32 %5, %6
  %10 = add nsw i32 %9, %7
  %11 = add nsw i32 %10, %8
  ret i32 %11
}