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