71 lines
2.9 KiB
LLVM
71 lines
2.9 KiB
LLVM
; RUN: opt < %s -passes=pgo-instr-gen -S | FileCheck %s
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; Function Attrs: norecurse nounwind readnone uwtable
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define i32 @bar(i32 %v) local_unnamed_addr #0 {
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entry:
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%mul = shl nsw i32 %v, 1
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ret i32 %mul
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}
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; Function Attrs: norecurse nounwind readonly uwtable
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define i32 @foo(ptr nocapture readonly %p) #1 {
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entry:
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%targets = alloca [256 x ptr], align 16
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%arrayidx1 = getelementptr inbounds [256 x ptr], ptr %targets, i64 0, i64 93
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store ptr blockaddress(@foo, %if.end), ptr %arrayidx1, align 8
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br label %for.cond2
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for.cond2: ; preds = %if.end, %for.cond2, %entry
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; CHECK: for.cond2: ; preds = %.split1
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%p.addr.0 = phi ptr [ %p, %entry ], [ %incdec.ptr5, %if.end ], [ %incdec.ptr, %for.cond2 ]
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%incdec.ptr = getelementptr inbounds i8, ptr %p.addr.0, i64 1
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%0 = load i8, ptr %p.addr.0, align 1
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%cond = icmp eq i8 %0, 93
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br i1 %cond, label %if.end.preheader, label %for.cond2
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if.end.preheader: ; preds = %for.cond2
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br label %if.end
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if.end: ; preds = %if.end.preheader, %if.end
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; CHECK: if.end: ; preds = %.split1
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%p.addr.1 = phi ptr [ %incdec.ptr5, %if.end ], [ %incdec.ptr, %if.end.preheader ]
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%incdec.ptr5 = getelementptr inbounds i8, ptr %p.addr.1, i64 1
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%1 = load i8, ptr %p.addr.1, align 1
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%idxprom6 = zext i8 %1 to i64
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%arrayidx7 = getelementptr inbounds [256 x ptr], ptr %targets, i64 0, i64 %idxprom6
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%2 = load ptr, ptr %arrayidx7, align 8
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indirectbr ptr %2, [label %for.cond2, label %if.end]
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; CHECK: indirectbr ptr %2, [label %for.cond2, label %if.end]
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}
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;; If an indirectbr critical edge cannot be split, ignore it.
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;; The edge will not be profiled.
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; CHECK-LABEL: @cannot_split(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: call void @llvm.instrprof.increment
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; CHECK: indirect:
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; CHECK-NOT: call void @llvm.instrprof.increment
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; CHECK: indirect2:
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; CHECK-NEXT: call void @llvm.instrprof.increment
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define i32 @cannot_split(ptr nocapture readonly %p) {
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entry:
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%targets = alloca <2 x ptr>, align 16
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store <2 x ptr> <ptr blockaddress(@cannot_split, %indirect), ptr blockaddress(@cannot_split, %end)>, ptr %targets, align 16
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%arrayidx2 = getelementptr inbounds i8, ptr %p, i64 1
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%0 = load i8, ptr %arrayidx2
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%idxprom = sext i8 %0 to i64
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%arrayidx3 = getelementptr inbounds <2 x ptr>, ptr %targets, i64 0, i64 %idxprom
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%1 = load ptr, ptr %arrayidx3, align 8
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br label %indirect
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indirect: ; preds = %entry, %indirect
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indirectbr ptr %1, [label %indirect, label %end, label %indirect2]
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indirect2:
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; For this test we do not want critical edges split. Adding a 2nd `indirectbr`
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; does the trick.
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indirectbr ptr %1, [label %indirect, label %end]
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end: ; preds = %indirect
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ret i32 0
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}
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