derek.holloway
7502bf64a4
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50 lines
2.3 KiB
LLVM
50 lines
2.3 KiB
LLVM
; REQUIRES: asserts
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; RUN: opt -passes='cgscc(inline),instcombine,cgscc(inline)' -S -debug-only=inline -disable-output < %s 2>&1 | FileCheck %s
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; This test shows that the recursive function will not get simplified
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; unless the caller is the function itself, not another different caller.
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; CHECK: Inlining calls in: test
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; CHECK: Function size: 2
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; CHECK: NOT Inlining (cost=never): recursive, Call: %call = tail call float @inline_rec_true_successor(float %x, float %scale)
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; CHECK: Inlining calls in: inline_rec_true_successor
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; CHECK: Function size: 10
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; CHECK: Inlining (cost=-35, threshold=337), Call: %call = tail call float @inline_rec_true_successor(float %fneg, float %scale)
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; CHECK: Size after inlining: 17
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; CHECK: NOT Inlining (cost=never): noinline function attribute, Call: %call_test = tail call float @test(float %fneg, float %common.ret18.op.i)
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; CHECK: NOT Inlining (cost=never): noinline function attribute, Call: %call_test.i = tail call float @test(float %x, float %call.i)
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; CHECK: NOT Inlining (cost=never): recursive, Call: %call.i = tail call float @inline_rec_true_successor(float %x, float %scale)
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; CHECK: Updated inlining SCC: (test, inline_rec_true_successor)
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; CHECK: Inlining calls in: test
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; CHECK: Function size: 2
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; CHECK: Inlining (cost=25, threshold=225), Call: %call = tail call float @inline_rec_true_successor(float %x, float %scale)
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; CHECK: Size after inlining: 10
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define float @test(float %x, float %scale) noinline {
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entry:
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%call = tail call float @inline_rec_true_successor(float %x, float %scale)
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ret float %call
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}
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define float @inline_rec_true_successor(float %x, float %scale) {
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entry:
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%cmp = fcmp olt float %x, 0.000000e+00
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br i1 %cmp, label %if.then, label %if.end
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common.ret18: ; preds = %if.then, %if.end
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%common.ret18.op = phi float [ %call_test, %if.then ], [ %mul, %if.end ]
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ret float %common.ret18.op
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if.then: ; preds = %entry
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%fneg = fneg float %x
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%call = tail call float @inline_rec_true_successor(float %fneg, float %scale)
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%call_test = tail call float @test(float %fneg, float %call)
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br label %common.ret18
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if.end: ; preds = %entry
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%mul = fmul float %x, %scale
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br label %common.ret18
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}
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