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https://github.com/c64scene-ar/llvm-6502.git
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d383b8eec3
cost so that they don't impact the vector bonus. Fundamentally, counting unsimplified instructions is just *wrong*; it will continue to introduce instability as things which do not generate code bizarrely impact inlining. For example, sufficiently nested inlined functions could turn off the vector bonus with lifetime markers just like the debug intrinsics do. =/ This is a short-term tactical fix. Long term, I think we need to remove the vector bonus entirely. That's a separate patch and discussion though. The patch to fix this provided by Dario Domizioli. I've added some comments about the planned direction and used a heavily pruned form of debug info intrinsics for the test case. While this debug info doesn't work or "do" anything useful, it lets us easily test all manner of interference easily, and I suspect this will not be the last time we want to craft a pattern where debug info interferes with the inliner in a problematic way. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200609 91177308-0d34-0410-b5e6-96231b3b80d8
56 lines
2.3 KiB
LLVM
56 lines
2.3 KiB
LLVM
; RUN: opt < %s -S -inline -inline-threshold=2 | FileCheck %s
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; RUN: opt < %s -S -strip-debug -inline -inline-threshold=2 | FileCheck %s
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;
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; The purpose of this test is to check that debug info doesn't influence
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; inlining decisions.
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target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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declare void @llvm.dbg.declare(metadata, metadata) #1
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declare void @llvm.dbg.value(metadata, i64, metadata) #1
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define <4 x float> @inner_vectors(<4 x float> %a, <4 x float> %b) {
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entry:
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call void @llvm.dbg.value(metadata !{}, i64 0, metadata !{})
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%mul = fmul <4 x float> %a, <float 3.000000e+00, float 3.000000e+00, float 3.000000e+00, float 3.000000e+00>
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call void @llvm.dbg.value(metadata !{}, i64 0, metadata !{})
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%mul1 = fmul <4 x float> %b, <float 5.000000e+00, float 5.000000e+00, float 5.000000e+00, float 5.000000e+00>
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call void @llvm.dbg.value(metadata !{}, i64 0, metadata !{})
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%add = fadd <4 x float> %mul, %mul1
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ret <4 x float> %add
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}
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define float @outer_vectors(<4 x float> %a, <4 x float> %b) {
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; CHECK-LABEL: @outer_vectors(
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; CHECK-NOT: call <4 x float> @inner_vectors(
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; CHECK: ret float
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entry:
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call void @llvm.dbg.value(metadata !{}, i64 0, metadata !{})
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call void @llvm.dbg.value(metadata !{}, i64 0, metadata !{})
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%call = call <4 x float> @inner_vectors(<4 x float> %a, <4 x float> %b)
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call void @llvm.dbg.value(metadata !{}, i64 0, metadata !{})
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%vecext = extractelement <4 x float> %call, i32 0
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%vecext1 = extractelement <4 x float> %call, i32 1
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%add = fadd float %vecext, %vecext1
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%vecext2 = extractelement <4 x float> %call, i32 2
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%add3 = fadd float %add, %vecext2
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%vecext4 = extractelement <4 x float> %call, i32 3
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%add5 = fadd float %add3, %vecext4
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ret float %add5
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}
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attributes #0 = { nounwind readnone }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!3, !4}
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!llvm.ident = !{!5}
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!0 = metadata !{i32 786449, metadata !1, i32 4, metadata !"", i1 false, metadata !"", i32 0, metadata !2, metadata !2, metadata !{}, metadata !2, metadata !2, metadata !""}
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!1 = metadata !{metadata !"", metadata !""}
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!2 = metadata !{i32 0}
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!3 = metadata !{i32 2, metadata !"Dwarf Version", i32 4}
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!4 = metadata !{i32 1, metadata !"Debug Info Version", i32 1}
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!5 = metadata !{metadata !""}
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