56 lines · plain
1; REQUIRES: asserts2; RUN: opt < %s -S -debug-only=loop-unroll -passes=loop-unroll -unroll-runtime 2>&1 | FileCheck %s3; RUN: opt < %s -S -debug-only=loop-unroll -passes='require<profile-summary>,function(require<opt-remark-emit>,loop-unroll)' 2>&1 | FileCheck %s4 5; Regression test for setting the correct idom for exit blocks.6 7; CHECK: Loop Unroll: F[basic]8; CHECK: PEELING loop %for.body with iteration count 2!9 10define i32 @basic(ptr %p, i32 %k, i1 %c1, i1 %c2) #0 !prof !3 {11entry:12 %cmp3 = icmp slt i32 0, %k13 br i1 %cmp3, label %for.body.lr.ph, label %for.end14 15for.body.lr.ph: ; preds = %entry16 br label %for.body17 18for.body: ; preds = %for.body.lr.ph, %for.body19 %i.05 = phi i32 [ 0, %for.body.lr.ph ], [ %inc, %latch ]20 %p.addr.04 = phi ptr [ %p, %for.body.lr.ph ], [ %incdec.ptr, %latch ]21 %incdec.ptr = getelementptr inbounds i32, ptr %p.addr.04, i32 122 store i32 %i.05, ptr %p.addr.04, align 423 %inc = add nsw i32 %i.05, 124 %cmp = icmp slt i32 %inc, %k25 br i1 %c1, label %continue, label %to_side_exit26 27continue:28 br i1 %c2, label %latch, label %side_exit, !prof !229 30latch:31 br i1 %cmp, label %for.body, label %for.cond.for.end_crit_edge, !prof !132 33for.cond.for.end_crit_edge: ; preds = %for.body34 br label %for.end35 36to_side_exit:37 br i1 %c2, label %continue, label %side_exit, !prof !238 39 40for.end: ; preds = %for.cond.for.end_crit_edge, %entry41 %res = phi i32 [ 0, %entry ], [ %inc, %for.cond.for.end_crit_edge ]42 ret i32 %res43 44side_exit:45 %rval = call i32(...) @llvm.experimental.deoptimize.i32() [ "deopt"(i32 %inc) ]46 ret i32 %rval47}48 49declare i32 @llvm.experimental.deoptimize.i32(...)50 51attributes #0 = { nounwind }52 53!1 = !{!"branch_weights", i32 1, i32 1}54!2 = !{!"branch_weights", i32 1, i32 0}55!3 = !{!"function_entry_count", i64 1}56