mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-26 05:32:25 +00:00
dc89737bcd
functions. Make the function attributes pass add it to known library functions and when it can deduce it. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185735 91177308-0d34-0410-b5e6-96231b3b80d8
181 lines
4.6 KiB
LLVM
181 lines
4.6 KiB
LLVM
; RUN: opt < %s -functionattrs -S | FileCheck %s
|
|
@g = global i32* null ; <i32**> [#uses=1]
|
|
|
|
; CHECK: define i32* @c1(i32* readnone %q)
|
|
define i32* @c1(i32* %q) {
|
|
ret i32* %q
|
|
}
|
|
|
|
; CHECK: define void @c2(i32* %q)
|
|
; It would also be acceptable to mark %q as readnone. Update @c3 too.
|
|
define void @c2(i32* %q) {
|
|
store i32* %q, i32** @g
|
|
ret void
|
|
}
|
|
|
|
; CHECK: define void @c3(i32* %q)
|
|
define void @c3(i32* %q) {
|
|
call void @c2(i32* %q)
|
|
ret void
|
|
}
|
|
|
|
; CHECK: define i1 @c4(i32* %q, i32 %bitno)
|
|
define i1 @c4(i32* %q, i32 %bitno) {
|
|
%tmp = ptrtoint i32* %q to i32
|
|
%tmp2 = lshr i32 %tmp, %bitno
|
|
%bit = trunc i32 %tmp2 to i1
|
|
br i1 %bit, label %l1, label %l0
|
|
l0:
|
|
ret i1 0 ; escaping value not caught by def-use chaining.
|
|
l1:
|
|
ret i1 1 ; escaping value not caught by def-use chaining.
|
|
}
|
|
|
|
@lookup_table = global [2 x i1] [ i1 0, i1 1 ]
|
|
|
|
; CHECK: define i1 @c5(i32* %q, i32 %bitno)
|
|
define i1 @c5(i32* %q, i32 %bitno) {
|
|
%tmp = ptrtoint i32* %q to i32
|
|
%tmp2 = lshr i32 %tmp, %bitno
|
|
%bit = and i32 %tmp2, 1
|
|
; subtle escape mechanism follows
|
|
%lookup = getelementptr [2 x i1]* @lookup_table, i32 0, i32 %bit
|
|
%val = load i1* %lookup
|
|
ret i1 %val
|
|
}
|
|
|
|
declare void @throw_if_bit_set(i8*, i8) readonly
|
|
|
|
; CHECK: define i1 @c6(i8* readonly %q, i8 %bit)
|
|
define i1 @c6(i8* %q, i8 %bit) {
|
|
invoke void @throw_if_bit_set(i8* %q, i8 %bit)
|
|
to label %ret0 unwind label %ret1
|
|
ret0:
|
|
ret i1 0
|
|
ret1:
|
|
%exn = landingpad {i8*, i32} personality i32 (...)* @__gxx_personality_v0
|
|
cleanup
|
|
ret i1 1
|
|
}
|
|
|
|
declare i32 @__gxx_personality_v0(...)
|
|
|
|
define i1* @lookup_bit(i32* %q, i32 %bitno) readnone nounwind {
|
|
%tmp = ptrtoint i32* %q to i32
|
|
%tmp2 = lshr i32 %tmp, %bitno
|
|
%bit = and i32 %tmp2, 1
|
|
%lookup = getelementptr [2 x i1]* @lookup_table, i32 0, i32 %bit
|
|
ret i1* %lookup
|
|
}
|
|
|
|
; CHECK: define i1 @c7(i32* readnone %q, i32 %bitno)
|
|
define i1 @c7(i32* %q, i32 %bitno) {
|
|
%ptr = call i1* @lookup_bit(i32* %q, i32 %bitno)
|
|
%val = load i1* %ptr
|
|
ret i1 %val
|
|
}
|
|
|
|
|
|
; CHECK: define i32 @nc1(i32* %q, i32* nocapture %p, i1 %b)
|
|
define i32 @nc1(i32* %q, i32* %p, i1 %b) {
|
|
e:
|
|
br label %l
|
|
l:
|
|
%x = phi i32* [ %p, %e ]
|
|
%y = phi i32* [ %q, %e ]
|
|
%tmp = bitcast i32* %x to i32* ; <i32*> [#uses=2]
|
|
%tmp2 = select i1 %b, i32* %tmp, i32* %y
|
|
%val = load i32* %tmp2 ; <i32> [#uses=1]
|
|
store i32 0, i32* %tmp
|
|
store i32* %y, i32** @g
|
|
ret i32 %val
|
|
}
|
|
|
|
; CHECK: define void @nc2(i32* nocapture %p, i32* %q)
|
|
define void @nc2(i32* %p, i32* %q) {
|
|
%1 = call i32 @nc1(i32* %q, i32* %p, i1 0) ; <i32> [#uses=0]
|
|
ret void
|
|
}
|
|
|
|
; CHECK: define void @nc3(void ()* nocapture %p)
|
|
define void @nc3(void ()* %p) {
|
|
call void %p()
|
|
ret void
|
|
}
|
|
|
|
declare void @external(i8*) readonly nounwind
|
|
; CHECK: define void @nc4(i8* nocapture readonly %p)
|
|
define void @nc4(i8* %p) {
|
|
call void @external(i8* %p)
|
|
ret void
|
|
}
|
|
|
|
; CHECK: define void @nc5(void (i8*)* nocapture %f, i8* nocapture %p)
|
|
define void @nc5(void (i8*)* %f, i8* %p) {
|
|
call void %f(i8* %p) readonly nounwind
|
|
call void %f(i8* nocapture %p)
|
|
ret void
|
|
}
|
|
|
|
; CHECK: define void @test1_1(i8* nocapture readnone %x1_1, i8* %y1_1)
|
|
; It would be acceptable to add readnone to %y1_1 and %y1_2.
|
|
define void @test1_1(i8* %x1_1, i8* %y1_1) {
|
|
call i8* @test1_2(i8* %x1_1, i8* %y1_1)
|
|
store i32* null, i32** @g
|
|
ret void
|
|
}
|
|
|
|
; CHECK: define i8* @test1_2(i8* nocapture readnone %x1_2, i8* %y1_2)
|
|
define i8* @test1_2(i8* %x1_2, i8* %y1_2) {
|
|
call void @test1_1(i8* %x1_2, i8* %y1_2)
|
|
store i32* null, i32** @g
|
|
ret i8* %y1_2
|
|
}
|
|
|
|
; CHECK: define void @test2(i8* nocapture readnone %x2)
|
|
define void @test2(i8* %x2) {
|
|
call void @test2(i8* %x2)
|
|
store i32* null, i32** @g
|
|
ret void
|
|
}
|
|
|
|
; CHECK: define void @test3(i8* nocapture readnone %x3, i8* nocapture readnone %y3, i8* nocapture readnone %z3)
|
|
define void @test3(i8* %x3, i8* %y3, i8* %z3) {
|
|
call void @test3(i8* %z3, i8* %y3, i8* %x3)
|
|
store i32* null, i32** @g
|
|
ret void
|
|
}
|
|
|
|
; CHECK: define void @test4_1(i8* %x4_1)
|
|
define void @test4_1(i8* %x4_1) {
|
|
call i8* @test4_2(i8* %x4_1, i8* %x4_1, i8* %x4_1)
|
|
store i32* null, i32** @g
|
|
ret void
|
|
}
|
|
|
|
; CHECK: define i8* @test4_2(i8* nocapture readnone %x4_2, i8* readnone %y4_2, i8* nocapture readnone %z4_2)
|
|
define i8* @test4_2(i8* %x4_2, i8* %y4_2, i8* %z4_2) {
|
|
call void @test4_1(i8* null)
|
|
store i32* null, i32** @g
|
|
ret i8* %y4_2
|
|
}
|
|
|
|
declare i8* @test5_1(i8* %x5_1)
|
|
|
|
; CHECK: define void @test5_2(i8* %x5_2)
|
|
define void @test5_2(i8* %x5_2) {
|
|
call i8* @test5_1(i8* %x5_2)
|
|
store i32* null, i32** @g
|
|
ret void
|
|
}
|
|
|
|
declare void @test6_1(i8* %x6_1, i8* nocapture %y6_1, ...)
|
|
|
|
; CHECK: define void @test6_2(i8* %x6_2, i8* nocapture %y6_2, i8* %z6_2)
|
|
define void @test6_2(i8* %x6_2, i8* %y6_2, i8* %z6_2) {
|
|
call void (i8*, i8*, ...)* @test6_1(i8* %x6_2, i8* %y6_2, i8* %z6_2)
|
|
store i32* null, i32** @g
|
|
ret void
|
|
}
|
|
|