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1; Test -sanitizer-coverage-trace-compares=1 and how it prunes backedge compares.2; RUN: opt < %s -passes='module(sancov-module)' -sanitizer-coverage-level=1 -sanitizer-coverage-trace-compares=1 -sanitizer-coverage-prune-blocks=1 -S | FileCheck %s --check-prefix=PRUNE3; RUN: opt < %s -passes='module(sancov-module)' -sanitizer-coverage-level=1 -sanitizer-coverage-trace-compares=1 -sanitizer-coverage-prune-blocks=0 -S | FileCheck %s --check-prefix=NOPRUNE4 5target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"6target triple = "x86_64-unknown-linux-gnu"7 8define dso_local void @foo(ptr nocapture readnone %a, i32 %n) local_unnamed_addr {9entry:10 br label %do.body11 12do.body:13 %i.0 = phi i32 [ 0, %entry ], [ %inc, %do.body ]14 tail call void (...) @bar()15 %inc = add nuw nsw i32 %i.0, 116 %cmp = icmp slt i32 %inc, %n17;PRUNE-LABEL: foo18;PRUNE-NOT: __sanitizer_cov_trace_cmp419;PRUNE: ret void20 21;NOPRUNE-LABEL: foo22;NOPRUNE: call void @__sanitizer_cov_trace_cmp423;NOPRUNE-NEXT: icmp24;NOPRUNE: ret void25 26 br i1 %cmp, label %do.body, label %do.end27 28do.end:29 ret void30}31 32declare dso_local void @bar(...) local_unnamed_addr33