1; RUN: opt -mtriple=x86_64 -passes='loop-mssa(loop-predication,licm,simple-loop-unswitch<nontrivial>,loop-simplifycfg)' -debug-pass-manager -debug-only=branch-prob -S < %s 2>&1 | FileCheck %s 2 3; REQUIRES: asserts 4 5; This test is to solely check that we do not run BPI every single time loop 6; predication is invoked (since BPI is preserved as part of 7; LoopStandardAnalysisResults). 8declare void @llvm.experimental.guard(i1, ...) 9 10; CHECK: Running pass: LoopPredicationPass on loop 11; CHECK-NEXT: Running pass: LICMPass on loop 12; CHECK-NEXT: Running pass: SimpleLoopUnswitchPass on loop 13; CHECK-NEXT: Running analysis: OuterAnalysisManagerProxy 14; CHECK-NEXT: Running pass: LoopPredicationPass on loop 15; CHECK-NEXT: Running pass: LICMPass on loop 16; CHECK-NEXT: Running pass: SimpleLoopUnswitchPass on loop 17; CHECK-NEXT: Running pass: LoopSimplifyCFGPass on loop 18 19define i32 @unsigned_loop_0_to_n_ult_check(ptr %array, i32 %length, i32 %n) { 20entry: 21 %tmp5 = icmp eq i32 %n, 0 22 br i1 %tmp5, label %exit, label %loop.preheader 23 24loop.preheader: ; preds = %entry 25 br label %loop 26 27loop: ; preds = %guarded, %loop.preheader 28 %loop.acc = phi i32 [ %loop.acc.next, %guarded ], [ 0, %loop.preheader ] 29 %i = phi i32 [ %i.next, %guarded ], [ 0, %loop.preheader ] 30 %within.bounds = icmp ult i32 %i, %length 31 %widenable_cond = call i1 @llvm.experimental.widenable.condition() 32 %exiplicit_guard_cond = and i1 %within.bounds, %widenable_cond 33 br i1 %exiplicit_guard_cond, label %guarded, label %deopt, !prof !0 34 35deopt: ; preds = %loop 36 %deoptcall = call i32 (...) @llvm.experimental.deoptimize.i32(i32 9) [ "deopt"() ] 37 ret i32 %deoptcall 38 39guarded: ; preds = %loop 40 %i.i64 = zext i32 %i to i64 41 %array.i.ptr = getelementptr inbounds i32, ptr %array, i64 %i.i64 42 %array.i = load i32, ptr %array.i.ptr, align 4 43 %loop.acc.next = add i32 %loop.acc, %array.i 44 %i.next = add nuw i32 %i, 1 45 %continue = icmp ult i32 %i.next, %n 46 br i1 %continue, label %loop, label %exit, !prof !2 47 48exit: ; preds = %guarded, %entry 49 %result = phi i32 [ 0, %entry ], [ %loop.acc.next, %guarded ] 50 ret i32 %result 51} 52 53declare i32 @llvm.experimental.deoptimize.i32(...) 54declare i1 @llvm.experimental.widenable.condition() #0 55 56attributes #0 = { inaccessiblememonly nounwind } 57 58!0 = !{!"branch_weights", i32 1048576, i32 1} 59!1 = !{i32 1, i32 -2147483648} 60!2 = !{!"branch_weights", i32 1024, i32 1} 61