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// RUN: %clang_cc1 -emit-llvm %s -o - | FileCheck %s
// We expect to get a loop structure like this:
// do.body: ; preds = %do.cond, ...
// ...
// br label %do.cond
// do.cond: ; preds = %do.body
// ...
// br i1 %cmp, label %do.body, label %do.end
// do.end: ; preds = %do.cond
// ...
//
// Verify that the loop metadata only is put on the backedge.
//
// CHECK-NOT: llvm.loop
// CHECK-LABEL: do.cond:
// CHECK: br {{.*}}, label %do.body, label %do.end, !llvm.loop ![[LMD1:[0-9]+]]
// CHECK-LABEL: do.end:
// CHECK-NOT: llvm.loop
// CHECK: ![[LMD1]] = distinct !{![[LMD1]], ![[LMD2:[0-9]+]]}
// CHECK: ![[LMD2]] = !{!"llvm.loop.unroll.count", i32 4}
int test(int a[], int n) {
int i = 0;
int sum = 0;
#pragma unroll 4
do
{
a[i] = a[i] + 1;
sum = sum + a[i];
i++;
} while (i < n);
return sum;
}
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