76 lines
2.3 KiB
LLVM
76 lines
2.3 KiB
LLVM
; RUN: opt -S -passes='cgscc(inline,instcombine)' < %s | FileCheck %s
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; RUN: opt -S -intra-scc-cost-multiplier=3 -passes='cgscc(inline,instcombine)' < %s | FileCheck %s --check-prefix=THREE
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; We use call to a dummy function to avoid inlining test1 into test2 or vice
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; versa, such that we aren't left with a trivial cycle, as trivial cycles are
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; special-cased to never be inlined.
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; However, InstCombine will eliminate these calls after inlining, and thus
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; make the functions eligible for inlining in their callers.
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declare void @dummy() readnone nounwind willreturn
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define void @test1() {
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; CHECK-LABEL: define void @test1(
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; CHECK-NEXT: call void @test2()
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; CHECK-NEXT: call void @test2()
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; CHECK-NEXT: ret void
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;
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call void @test2()
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call void @test2()
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call void @dummy()
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call void @dummy()
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call void @dummy()
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call void @dummy()
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call void @dummy()
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call void @dummy()
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call void @dummy()
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call void @dummy()
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call void @dummy()
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call void @dummy()
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call void @dummy()
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ret void
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}
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define void @test2() {
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; CHECK-LABEL: define void @test2(
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; CHECK-NEXT: call void @test1()
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; CHECK-NEXT: call void @test1()
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; CHECK-NEXT: ret void
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;
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call void @test1()
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call void @test1()
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call void @dummy()
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call void @dummy()
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call void @dummy()
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call void @dummy()
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call void @dummy()
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call void @dummy()
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call void @dummy()
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call void @dummy()
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call void @dummy()
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call void @dummy()
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call void @dummy()
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ret void
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}
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; The inlined call sites should have the "function-inline-cost-multiplier" call site attribute.
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; This test is a bit fragile in the exact number of inlining that happens based on thresholds.
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define void @test3() {
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; CHECK-LABEL: define void @test3(
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; CHECK-NEXT: call void @test2() #[[COSTMULT:[0-9]+]]
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; CHECK-NEXT: call void @test2() #[[COSTMULT]]
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; CHECK-NEXT: call void @test2() #[[COSTMULT]]
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; CHECK-NEXT: call void @test2() #[[COSTMULT]]
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; CHECK-NEXT: call void @test2() #[[COSTMULT]]
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; CHECK-NEXT: call void @test2() #[[COSTMULT]]
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; CHECK-NEXT: call void @test2() #[[COSTMULT]]
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; CHECK-NEXT: call void @test2() #[[COSTMULT]]
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; CHECK-NEXT: ret void
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;
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call void @test2()
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call void @test2()
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ret void
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}
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; CHECK: [[COSTMULT]] = { "function-inline-cost-multiplier"="4" }
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; THREE: "function-inline-cost-multiplier"="9"
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