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; RUN: opt -loop-unroll -S -mtriple arm-none-eabi -mcpu=cortex-m7 %s | FileCheck %s -check-prefix=UNROLL
; This test is meant to check that this loop is unrolled into three iterations.
; UNROLL-LABEL: @test
; UNROLL: load i32, i32*
; UNROLL: load i32, i32*
; UNROLL: load i32, i32*
; UNROLL-NOT: load i32, i32*
define void @test(i32* %x, i32 %n) {
entry:
%sub = add nsw i32 %n, -1
%rem = srem i32 %sub, 4
%cmp7 = icmp sgt i32 %rem, 0
br i1 %cmp7, label %while.body, label %while.end
while.body: ; preds = %entry, %if.end
%x.addr.09 = phi i32* [ %incdec.ptr, %if.end ], [ %x, %entry ]
%n.addr.08 = phi i32 [ %dec, %if.end ], [ %rem, %entry ]
%0 = load i32, i32* %x.addr.09, align 4
%cmp1 = icmp slt i32 %0, 10
br i1 %cmp1, label %if.then, label %if.end
if.then: ; preds = %while.body
store i32 0, i32* %x.addr.09, align 4
br label %if.end
if.end: ; preds = %if.then, %while.body
%incdec.ptr = getelementptr inbounds i32, i32* %x.addr.09, i32 1
%dec = add nsw i32 %n.addr.08, -1
%cmp = icmp sgt i32 %dec, 0
br i1 %cmp, label %while.body, label %while.end
while.end: ; preds = %if.end, %entry
ret void
}
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