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; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc -mtriple=thumbv7 %s -o - | FileCheck %s
; Test the branch to return in BB4 is converted to return.
define i32 @foo(ptr %x, i32 %n) {
; CHECK-LABEL: foo:
; CHECK: @ %bb.0: @ %entry
; CHECK-NEXT: cmp r1, #1
; CHECK-NEXT: blt .LBB0_4
; CHECK-NEXT: @ %bb.1: @ %for.body.preheader
; CHECK-NEXT: bic r3, r1, #3
; CHECK-NEXT: mov r12, r0
; CHECK-NEXT: cmp r1, #4
; CHECK-NEXT: bhs .LBB0_3
; CHECK-NEXT: @ %bb.2:
; CHECK-NEXT: movs r0, #0
; CHECK-NEXT: b .LBB0_6
; CHECK-NEXT: .LBB0_3: @ %middle.block
; CHECK-NEXT: cmp r1, r3
; CHECK-NEXT: bne .LBB0_5
; CHECK-NEXT: .LBB0_4:
; CHECK-NEXT: movs r0, #0
; CHECK-NEXT: bx lr
; CHECK-NEXT: .LBB0_5:
; CHECK-NEXT: ldr.w r0, [r12]
; CHECK-NEXT: .LBB0_6: @ %for.body.preheader1
; CHECK-NEXT: subs r3, r1, r3
; CHECK-NEXT: mvn r2, #12
; CHECK-NEXT: and.w r1, r2, r1, lsl #2
; CHECK-NEXT: add r1, r12
; CHECK-NEXT: .LBB0_7: @ %for.body
; CHECK-NEXT: @ =>This Inner Loop Header: Depth=1
; CHECK-NEXT: ldr r2, [r1], #4
; CHECK-NEXT: subs r3, #1
; CHECK-NEXT: add r0, r2
; CHECK-NEXT: bne .LBB0_7
; CHECK-NEXT: @ %bb.8: @ %for.cond.cleanup
; CHECK-NEXT: bx lr
entry:
%n.vec = and i32 %n, -4
%cmp6 = icmp sgt i32 %n, 0
br i1 %cmp6, label %for.body.preheader, label %for.cond.cleanup
for.body.preheader: ; preds = %entry
%min.iters.check = icmp ult i32 %n, 4
br i1 %min.iters.check, label %for.body.preheader1, label %middle.block
middle.block:
%x3 = load i32, ptr %x, align 4
%cmp.n = icmp eq i32 %n.vec, %n
br i1 %cmp.n, label %for.cond.cleanup, label %for.body.preheader1
for.body.preheader1: ; preds = %middle.block, %for.body.preheader
%r.07.ph = phi i32 [ 0, %for.body.preheader ], [ %x3, %middle.block ]
br label %for.body
for.body: ; preds = %for.body.preheader1, %for.body
%i.08 = phi i32 [ %inc, %for.body ], [ %n.vec, %for.body.preheader1 ]
%r.07 = phi i32 [ %add, %for.body ], [ %r.07.ph, %for.body.preheader1 ]
%arrayidx = getelementptr inbounds i32, ptr %x, i32 %i.08
%v5 = load i32, ptr %arrayidx, align 4
%add = add nsw i32 %v5, %r.07
%inc = add nuw nsw i32 %i.08, 1
%exitcond = icmp eq i32 %inc, %n
br i1 %exitcond, label %for.cond.cleanup, label %for.body
for.cond.cleanup: ; preds = %for.body, %middle.block, %entry
%r.0.lcssa = phi i32 [ 0, %entry ], [ 0, %middle.block ], [ %add, %for.body ]
ret i32 %r.0.lcssa
}
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