c81d84c30b
- Consider inlining recursive function of depth 1 only when
the caller is the function itself instead of inlining it
for each callsite so that we avoid redundant work.
- Use CondContext instead of DomTree for better compilation time.
50 lines
2.3 KiB
LLVM
50 lines
2.3 KiB
LLVM
; 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
|
|
}
|