ctrloops.ll   [plain text]

target datalayout = "E-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v128:128:128-n32:64"
target triple = "powerpc64-unknown-freebsd10.0"
; RUN: llc < %s -march=ppc64 | FileCheck %s

@a = common global i32 0, align 4

define void @test1(i32 %c) nounwind {
entry:
  br label %for.body

for.body:                                         ; preds = %for.body, %entry
  %i.01 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
  %0 = load volatile i32* @a, align 4, !tbaa !0
  %add = add nsw i32 %0, %c
  store volatile i32 %add, i32* @a, align 4, !tbaa !0
  %inc = add nsw i32 %i.01, 1
  %exitcond = icmp eq i32 %inc, 2048
  br i1 %exitcond, label %for.end, label %for.body

for.end:                                          ; preds = %for.body
  ret void
; CHECK: @test1
; CHECK-NOT: or 3, 3, 3
; CHECK: mtctr
; CHECK-NOT: addi
; CHECK-NOT: cmplwi
; CHECK: bdnz
}

define void @test2(i32 %c, i32 %d) nounwind {
entry:
  %cmp1 = icmp sgt i32 %d, 0
  br i1 %cmp1, label %for.body, label %for.end

for.body:                                         ; preds = %entry, %for.body
  %i.02 = phi i32 [ %inc, %for.body ], [ 0, %entry ]
  %0 = load volatile i32* @a, align 4, !tbaa !0
  %add = add nsw i32 %0, %c
  store volatile i32 %add, i32* @a, align 4, !tbaa !0
  %inc = add nsw i32 %i.02, 1
  %exitcond = icmp eq i32 %inc, %d
  br i1 %exitcond, label %for.end, label %for.body

for.end:                                          ; preds = %for.body, %entry
  ret void
; CHECK: @test2
; CHECK: mtctr
; CHECK-NOT: addi
; CHECK-NOT: cmplwi
; CHECK: bdnz
}

define void @test3(i32 %c, i32 %d) nounwind {
entry:
  %cmp1 = icmp sgt i32 %d, 0
  br i1 %cmp1, label %for.body, label %for.end

for.body:                                         ; preds = %entry, %for.body
  %i.02 = phi i32 [ %inc, %for.body ], [ 0, %entry ]
  %mul = mul nsw i32 %i.02, %c
  %0 = load volatile i32* @a, align 4, !tbaa !0
  %add = add nsw i32 %0, %mul
  store volatile i32 %add, i32* @a, align 4, !tbaa !0
  %inc = add nsw i32 %i.02, 1
  %exitcond = icmp eq i32 %inc, %d
  br i1 %exitcond, label %for.end, label %for.body

for.end:                                          ; preds = %for.body, %entry
  ret void
; CHECK: @test3
; CHECK: mtctr
; CHECK-NOT: addi
; CHECK-NOT: cmplwi
; CHECK: bdnz
}

!0 = metadata !{metadata !"int", metadata !1}
!1 = metadata !{metadata !"omnipotent char", metadata !2}
!2 = metadata !{metadata !"Simple C/C++ TBAA"}