forked from OSchip/llvm-project
37 lines
971 B
C++
37 lines
971 B
C++
// 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;
|
|
}
|