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- ; RUN: opt -loop-unroll -S %s | FileCheck %s
- ; extern void f(int);
- ; void test1(int v) {
- ; for (int i=v; i<=v+1; ++i)
- ; f(i);
- ; }
- ;
- ; We can use the nsw information to see that the tripcount will be 2, so the
- ; loop should be unrolled as this is always beneficial
- declare void @f(i32)
- ; CHECK-LABEL: @test1
- define void @test1(i32 %v) {
- entry:
- %add = add nsw i32 %v, 1
- br label %for.body
- for.body:
- %i.04 = phi i32 [ %v, %entry ], [ %inc, %for.body ]
- tail call void @f(i32 %i.04)
- %inc = add nsw i32 %i.04, 1
- %cmp = icmp slt i32 %i.04, %add
- br i1 %cmp, label %for.body, label %for.end
- ; CHECK: call void @f
- ; CHECK-NOT: br i1
- ; CHECK: call void @f
- for.end:
- ret void
- }
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