// Special handling for calls.
if (const auto *Call = dyn_cast<CallBase>(&I)) {
if (const Function *F = Call->getCalledFunction()) {
+ bool IsLoweredToCall = TTI.isLoweredToCall(F);
// If a function is both internal and has a single use, then it is
// extremely likely to get inlined in the future (it was probably
// exposed by an interleaved devirtualization pass).
// When preparing for LTO, liberally consider calls as inline
// candidates.
- if (!Call->isNoInline() &&
+ if (!Call->isNoInline() && IsLoweredToCall &&
((F->hasInternalLinkage() && F->hasOneUse()) || PrepareForLTO)) {
++NumInlineCandidates;
}
if (F == BB->getParent())
isRecursive = true;
- if (TTI.isLoweredToCall(F))
+ if (IsLoweredToCall)
++NumCalls;
} else {
// We don't want inline asm to count as a call - that would prevent loop
define void @may_be_inlined() {
ret void
}
+
+; Intrinsics, like @llvm.dbg.value are never inlined and should not block loop
+; rotation, even when preparing for LTO.
+define void @test_prepare_for_lto_intrinsic() !dbg !7 {
+; FULL-LABEL: @test_prepare_for_lto_intrinsic(
+; FULL-NEXT: entry:
+; FULL-NEXT: %array = alloca [20 x i32], align 16
+; FULL-NEXT: call void @llvm.dbg.value(metadata i32 0, metadata !12, metadata !DIExpression()), !dbg !13
+; FULL-NEXT: %arrayidx = getelementptr inbounds [20 x i32], [20 x i32]* %array, i64 0, i64 0
+; FULL-NEXT: br label %for.body
+;
+; PREPARE-LABEL: @test_prepare_for_lto_intrinsic(
+; PREPARE-NEXT: entry:
+; PREPARE-NEXT: %array = alloca [20 x i32], align 16
+; PREPARE-NEXT: call void @llvm.dbg.value(metadata i32 0, metadata !12, metadata !DIExpression()), !dbg !13
+; PREPARE-NEXT: %arrayidx = getelementptr inbounds [20 x i32], [20 x i32]* %array, i64 0, i64 0
+; PREPARE-NEXT: br label %for.body
+;
+entry:
+ %array = alloca [20 x i32], align 16
+ br label %for.cond
+
+for.cond: ; preds = %for.body, %entry
+ %i.0 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
+ call void @llvm.dbg.value(metadata i32 %i.0, metadata !12, metadata !DIExpression()), !dbg !13
+ %cmp = icmp slt i32 %i.0, 100
+ %arrayidx = getelementptr inbounds [20 x i32], [20 x i32]* %array, i64 0, i64 0
+ br i1 %cmp, label %for.body, label %for.end
+
+for.body: ; preds = %for.cond
+ store i32 0, i32* %arrayidx, align 16
+ %inc = add nsw i32 %i.0, 1
+ br label %for.cond
+
+for.end: ; preds = %for.cond
+ ret void
+}
+
+declare void @llvm.dbg.value(metadata, metadata, metadata) #2
+
+
+!llvm.dbg.cu = !{!0}
+!llvm.module.flags = !{!3, !4, !5, !6}
+
+!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
+!1 = !DIFile(filename: "test.c", directory: "/tmp")
+!2 = !{}
+!3 = !{i32 2, !"Dwarf Version", i32 4}
+!4 = !{i32 2, !"Debug Info Version", i32 3}
+!5 = !{i32 1, !"wchar_size", i32 4}
+!6 = !{i32 7, !"PIC Level", i32 2}
+!7 = distinct !DISubprogram(name: "f", scope: !1, file: !1, line: 2, type: !8, scopeLine: 2, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !11)
+!8 = !DISubroutineType(types: !9)
+!9 = !{null, !10}
+!10 = !DIBasicType(name: "long long int", size: 64, encoding: DW_ATE_signed)
+!11 = !{!12}
+!12 = !DILocalVariable(name: "input", arg: 1, scope: !7, file: !1, line: 2, type: !10)
+!13 = !DILocation(line: 2, column: 15, scope: !7)