1; RUN: opt < %s -passes=pgo-instr-gen -S | FileCheck %s 2 3; Function Attrs: norecurse nounwind readnone uwtable 4define i32 @bar(i32 %v) local_unnamed_addr #0 { 5entry: 6 %mul = shl nsw i32 %v, 1 7 ret i32 %mul 8} 9 10; Function Attrs: norecurse nounwind readonly uwtable 11define i32 @foo(ptr nocapture readonly %p) #1 { 12entry: 13 %targets = alloca [256 x ptr], align 16 14 %arrayidx1 = getelementptr inbounds [256 x ptr], ptr %targets, i64 0, i64 93 15 store ptr blockaddress(@foo, %if.end), ptr %arrayidx1, align 8 16 br label %for.cond2 17 18for.cond2: ; preds = %if.end, %for.cond2, %entry 19; CHECK: for.cond2: ; preds = %.split1 20 %p.addr.0 = phi ptr [ %p, %entry ], [ %incdec.ptr5, %if.end ], [ %incdec.ptr, %for.cond2 ] 21 %incdec.ptr = getelementptr inbounds i8, ptr %p.addr.0, i64 1 22 %0 = load i8, ptr %p.addr.0, align 1 23 %cond = icmp eq i8 %0, 93 24 br i1 %cond, label %if.end.preheader, label %for.cond2 25 26if.end.preheader: ; preds = %for.cond2 27 br label %if.end 28 29if.end: ; preds = %if.end.preheader, %if.end 30; CHECK: if.end: ; preds = %.split1 31 %p.addr.1 = phi ptr [ %incdec.ptr5, %if.end ], [ %incdec.ptr, %if.end.preheader ] 32 %incdec.ptr5 = getelementptr inbounds i8, ptr %p.addr.1, i64 1 33 %1 = load i8, ptr %p.addr.1, align 1 34 %idxprom6 = zext i8 %1 to i64 35 %arrayidx7 = getelementptr inbounds [256 x ptr], ptr %targets, i64 0, i64 %idxprom6 36 %2 = load ptr, ptr %arrayidx7, align 8 37 indirectbr ptr %2, [label %for.cond2, label %if.end] 38; CHECK: indirectbr ptr %2, [label %for.cond2, label %if.end] 39} 40 41;; If an indirectbr critical edge cannot be split, ignore it. 42;; The edge will not be profiled. 43; CHECK-LABEL: @cannot_split( 44; CHECK-NEXT: entry: 45; CHECK-NEXT: call void @llvm.instrprof.increment 46; CHECK: indirect: 47; CHECK-NOT: call void @llvm.instrprof.increment 48; CHECK: indirect2: 49; CHECK-NEXT: call void @llvm.instrprof.increment 50define i32 @cannot_split(ptr nocapture readonly %p) { 51entry: 52 %targets = alloca <2 x ptr>, align 16 53 store <2 x ptr> <ptr blockaddress(@cannot_split, %indirect), ptr blockaddress(@cannot_split, %end)>, ptr %targets, align 16 54 %arrayidx2 = getelementptr inbounds i8, ptr %p, i64 1 55 %0 = load i8, ptr %arrayidx2 56 %idxprom = sext i8 %0 to i64 57 %arrayidx3 = getelementptr inbounds <2 x ptr>, ptr %targets, i64 0, i64 %idxprom 58 %1 = load ptr, ptr %arrayidx3, align 8 59 br label %indirect 60 61indirect: ; preds = %entry, %indirect 62 indirectbr ptr %1, [label %indirect, label %end, label %indirect2] 63 64indirect2: 65 ; For this test we do not want critical edges split. Adding a 2nd `indirectbr` 66 ; does the trick. 67 indirectbr ptr %1, [label %indirect, label %end] 68 69end: ; preds = %indirect 70 ret i32 0 71} 72