mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-10-30 23:42:52 +01:00
111 lines
3.0 KiB
LLVM
111 lines
3.0 KiB
LLVM
; The inliner should never inline recursive functions into other functions.
|
|
; This effectively is just peeling off the first iteration of a loop, and the
|
|
; inliner heuristics are not set up for this.
|
|
|
|
; RUN: opt -inline -S < %s | FileCheck %s
|
|
|
|
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"
|
|
target triple = "x86_64-apple-darwin10.3"
|
|
|
|
@g = common global i32 0 ; <i32*> [#uses=1]
|
|
|
|
define internal void @foo(i32 %x) nounwind ssp {
|
|
entry:
|
|
%0 = icmp slt i32 %x, 0 ; <i1> [#uses=1]
|
|
br i1 %0, label %return, label %bb
|
|
|
|
bb: ; preds = %entry
|
|
%1 = sub nsw i32 %x, 1 ; <i32> [#uses=1]
|
|
call void @foo(i32 %1) nounwind ssp
|
|
store volatile i32 1, i32* @g, align 4
|
|
ret void
|
|
|
|
return: ; preds = %entry
|
|
ret void
|
|
}
|
|
|
|
|
|
;; CHECK: @bonk
|
|
;; CHECK: call void @foo(i32 42)
|
|
define void @bonk() nounwind ssp {
|
|
entry:
|
|
call void @foo(i32 42) nounwind ssp
|
|
ret void
|
|
}
|
|
|
|
|
|
|
|
;; Here is an indirect case that should not be infinitely inlined.
|
|
|
|
define internal void @f1(i32 %x, i8* %Foo, i8* %Bar) nounwind ssp {
|
|
entry:
|
|
%0 = bitcast i8* %Bar to void (i32, i8*, i8*)*
|
|
%1 = sub nsw i32 %x, 1
|
|
call void %0(i32 %1, i8* %Foo, i8* %Bar) nounwind
|
|
store volatile i32 42, i32* @g, align 4
|
|
ret void
|
|
}
|
|
|
|
define internal void @f2(i32 %x, i8* %Foo, i8* %Bar) nounwind ssp {
|
|
entry:
|
|
%0 = icmp slt i32 %x, 0 ; <i1> [#uses=1]
|
|
br i1 %0, label %return, label %bb
|
|
|
|
bb: ; preds = %entry
|
|
%1 = bitcast i8* %Foo to void (i32, i8*, i8*)* ; <void (i32, i8*, i8*)*> [#uses=1]
|
|
call void %1(i32 %x, i8* %Foo, i8* %Bar) nounwind
|
|
store volatile i32 13, i32* @g, align 4
|
|
ret void
|
|
|
|
return: ; preds = %entry
|
|
ret void
|
|
}
|
|
|
|
|
|
; CHECK: @top_level
|
|
; CHECK: call void @f2(i32 122
|
|
; Here we inline one instance of the cycle, but we don't want to completely
|
|
; unroll it.
|
|
define void @top_level() nounwind ssp {
|
|
entry:
|
|
call void @f2(i32 123, i8* bitcast (void (i32, i8*, i8*)* @f1 to i8*), i8* bitcast (void (i32, i8*, i8*)* @f2 to i8*)) nounwind ssp
|
|
ret void
|
|
}
|
|
|
|
|
|
; Check that a recursive function, when called with a constant that makes the
|
|
; recursive path dead code can actually be inlined.
|
|
define i32 @fib(i32 %i) {
|
|
entry:
|
|
%is.zero = icmp eq i32 %i, 0
|
|
br i1 %is.zero, label %zero.then, label %zero.else
|
|
|
|
zero.then:
|
|
ret i32 0
|
|
|
|
zero.else:
|
|
%is.one = icmp eq i32 %i, 1
|
|
br i1 %is.one, label %one.then, label %one.else
|
|
|
|
one.then:
|
|
ret i32 1
|
|
|
|
one.else:
|
|
%i1 = sub i32 %i, 1
|
|
%f1 = call i32 @fib(i32 %i1)
|
|
%i2 = sub i32 %i, 2
|
|
%f2 = call i32 @fib(i32 %i2)
|
|
%f = add i32 %f1, %f2
|
|
ret i32 %f
|
|
}
|
|
|
|
define i32 @fib_caller() {
|
|
; CHECK: @fib_caller
|
|
; CHECK-NOT: call
|
|
; CHECK: ret
|
|
%f1 = call i32 @fib(i32 0)
|
|
%f2 = call i32 @fib(i32 1)
|
|
%result = add i32 %f1, %f2
|
|
ret i32 %result
|
|
}
|