llvm-6502/test/CodeGen/Thumb/thumb-memcpy-ldm-stm.ll
James Molloy 5eba90a861 Disable the load/store optimization pass for Thumb-1.
Moritz's changes have improved codegen a lot, but further testing showed significant correctness problems. Disable by default until these have been worked out.

Patch by Moritz Roth!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210789 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-12 15:18:33 +00:00

39 lines
1.0 KiB
LLVM

; RUN: llc -mtriple=thumbv6m-eabi %s -o - | FileCheck %s
; XFAIL: *
@d = external global [64 x i32]
@s = external global [64 x i32]
; Function Attrs: nounwind
define void @t1() #0 {
entry:
; CHECK: ldr [[REG0:r[0-9]]],
; CHECK: ldm [[REG0]]!,
; CHECK: ldr [[REG1:r[0-9]]],
; CHECK: stm [[REG1]]!,
; CHECK: subs [[REG0]], #32
; CHECK-NEXT: ldrb
; CHECK: subs [[REG1]], #32
; CHECK-NEXT: strb
tail call void @llvm.memcpy.p0i8.p0i8.i32(i8* bitcast ([64 x i32]* @s to i8*), i8* bitcast ([64 x i32]* @d to i8*), i32 33, i32 4, i1 false)
ret void
}
; Function Attrs: nounwind
define void @t2() #0 {
entry:
; CHECK: ldr [[REG0:r[0-9]]],
; CHECK: ldm [[REG0]]!,
; CHECK: ldr [[REG1:r[0-9]]],
; CHECK: stm [[REG1]]!,
; CHECK: ldrh
; CHECK: ldrb
; CHECK: strb
; CHECK: strh
tail call void @llvm.memcpy.p0i8.p0i8.i32(i8* bitcast ([64 x i32]* @s to i8*), i8* bitcast ([64 x i32]* @d to i8*), i32 15, i32 4, i1 false)
ret void
}
; Function Attrs: nounwind
declare void @llvm.memcpy.p0i8.p0i8.i32(i8* nocapture, i8* nocapture readonly, i32, i32, i1) #1