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llvm/test/Transforms/InstCombine/call.ll
Matt Arsenault 3e1c40de7f Cleanup handling of constant function casts. 
Some of this code is no longer necessary since int<->ptr casts are no
longer occur as of r187444.

This also fixes handling vectors of pointers, and adds a bunch of new
testcases for vectors and address spaces.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@190885 91177308-0d34-0410-b5e6-96231b3b80d8
2013-09-17 21:10:14 +00:00

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7.3 KiB
LLVM
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; Ignore stderr, we expect warnings there
; RUN: opt < %s -instcombine 2> /dev/null -S | FileCheck %s
target datalayout = "E-p:64:64:64-p1:16:16:16-a0:0:8-f32:32:32-f64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-v64:64:64-v128:128:128"
; Simple case, argument translatable without changing the value
declare void @test1a(i8*)
define void @test1(i32* %A) {
; CHECK-LABEL: @test1(
; CHECK: %1 = bitcast i32* %A to i8*
; CHECK: call void @test1a(i8* %1)
; CHECK: ret void
call void bitcast (void (i8*)* @test1a to void (i32*)*)( i32* %A )
ret void
}
; Should not do because of change in address space of the parameter
define void @test1_as1_illegal(i32 addrspace(1)* %A) {
; CHECK-LABEL: @test1_as1_illegal(
; CHECK: call void bitcast
call void bitcast (void (i8*)* @test1a to void (i32 addrspace(1)*)*)(i32 addrspace(1)* %A)
ret void
}
; Test1, but the argument has a different sized address-space
declare void @test1a_as1(i8 addrspace(1)*)
; This one is OK to perform
define void @test1_as1(i32 addrspace(1)* %A) {
; CHECK-LABEL: @test1_as1(
; CHECK: %1 = bitcast i32 addrspace(1)* %A to i8 addrspace(1)*
; CHECK: call void @test1a_as1(i8 addrspace(1)* %1)
; CHECK: ret void
call void bitcast (void (i8 addrspace(1)*)* @test1a_as1 to void (i32 addrspace(1)*)*)(i32 addrspace(1)* %A )
ret void
}
; More complex case, translate argument because of resolution. This is safe
; because we have the body of the function
define void @test2a(i8 %A) {
; CHECK-LABEL: @test2a(
; CHECK: ret void
ret void
}
define i32 @test2(i32 %A) {
; CHECK-LABEL: @test2(
; CHECK: call void bitcast
; CHECK: ret i32 %A
call void bitcast (void (i8)* @test2a to void (i32)*)( i32 %A )
ret i32 %A
}
; Resolving this should insert a cast from sbyte to int, following the C
; promotion rules.
define void @test3a(i8, ...) {unreachable }
define void @test3(i8 %A, i8 %B) {
; CHECK-LABEL: @test3(
; CHECK: %1 = zext i8 %B to i32
; CHECK: call void (i8, ...)* @test3a(i8 %A, i32 %1)
; CHECK: ret void
call void bitcast (void (i8, ...)* @test3a to void (i8, i8)*)( i8 %A, i8 %B)
ret void
}
; test conversion of return value...
define i8 @test4a() {
; CHECK-LABEL: @test4a(
; CHECK: ret i8 0
ret i8 0
}
define i32 @test4() {
; CHECK-LABEL: @test4(
; CHECK: call i32 bitcast
%X = call i32 bitcast (i8 ()* @test4a to i32 ()*)( ) ; <i32> [#uses=1]
ret i32 %X
}
; test conversion of return value... no value conversion occurs so we can do
; this with just a prototype...
declare i32 @test5a()
define i32 @test5() {
; CHECK-LABEL: @test5(
; CHECK: %X = call i32 @test5a()
; CHECK: ret i32 %X
%X = call i32 @test5a( ) ; <i32> [#uses=1]
ret i32 %X
}
; test addition of new arguments...
declare i32 @test6a(i32)
define i32 @test6() {
; CHECK-LABEL: @test6(
; CHECK: %X = call i32 @test6a(i32 0)
; CHECK: ret i32 %X
%X = call i32 bitcast (i32 (i32)* @test6a to i32 ()*)( )
ret i32 %X
}
; test removal of arguments, only can happen with a function body
define void @test7a() {
; CHECK-LABEL: @test7a(
; CHECK: ret void
ret void
}
define void @test7() {
; CHECK-LABEL: @test7(
; CHECK: call void @test7a()
; CHECK: ret void
call void bitcast (void ()* @test7a to void (i32)*)( i32 5 )
ret void
}
; rdar://7590304
declare void @test8a()
define i8* @test8() {
; CHECK-LABEL: @test8(
; CHECK-NEXT: invoke void @test8a()
; Don't turn this into "unreachable": the callee and caller don't agree in
; calling conv, but the implementation of test8a may actually end up using the
; right calling conv.
invoke void @test8a()
to label %invoke.cont unwind label %try.handler
invoke.cont: ; preds = %entry
unreachable
try.handler: ; preds = %entry
%exn = landingpad {i8*, i32} personality i32 (...)* @__gxx_personality_v0
cleanup
ret i8* null
}
declare i32 @__gxx_personality_v0(...)
; Don't turn this into a direct call, because test9x is just a prototype and
; doing so will make it varargs.
; rdar://9038601
declare i8* @test9x(i8*, i8*, ...) noredzone
define i8* @test9(i8* %arg, i8* %tmp3) nounwind ssp noredzone {
; CHECK-LABEL: @test9
entry:
%call = call i8* bitcast (i8* (i8*, i8*, ...)* @test9x to i8* (i8*, i8*)*)(i8* %arg, i8* %tmp3) noredzone
ret i8* %call
; CHECK-LABEL: @test9(
; CHECK: call i8* bitcast
}
; Parameter that's a vector of pointers
declare void @test10a(<2 x i8*>)
define void @test10(<2 x i32*> %A) {
; CHECK-LABEL: @test10(
; CHECK: %1 = bitcast <2 x i32*> %A to <2 x i8*>
; CHECK: call void @test10a(<2 x i8*> %1)
; CHECK: ret void
call void bitcast (void (<2 x i8*>)* @test10a to void (<2 x i32*>)*)(<2 x i32*> %A)
ret void
}
; Don't transform because different address spaces
declare void @test10a_mixed_as(<2 x i8 addrspace(1)*>)
define void @test10_mixed_as(<2 x i8*> %A) {
; CHECK-LABEL: @test10_mixed_as(
; CHECK: call void bitcast
call void bitcast (void (<2 x i8 addrspace(1)*>)* @test10a_mixed_as to void (<2 x i8*>)*)(<2 x i8*> %A)
ret void
}
; Return type that's a pointer
define i8* @test11a() {
ret i8* zeroinitializer
}
define i32* @test11() {
; CHECK-LABEL: @test11(
; CHECK: %X = call i8* @test11a()
; CHECK: %1 = bitcast i8* %X to i32*
%X = call i32* bitcast (i8* ()* @test11a to i32* ()*)()
ret i32* %X
}
; Return type that's a pointer with a different address space
define i8 addrspace(1)* @test11a_mixed_as() {
ret i8 addrspace(1)* zeroinitializer
}
define i8* @test11_mixed_as() {
; CHECK-LABEL: @test11_mixed_as(
; CHECK: call i8* bitcast
%X = call i8* bitcast (i8 addrspace(1)* ()* @test11a_mixed_as to i8* ()*)()
ret i8* %X
}
; Return type that's a vector of pointers
define <2 x i8*> @test12a() {
ret <2 x i8*> zeroinitializer
}
define <2 x i32*> @test12() {
; CHECK-LABEL: @test12(
; CHECK: %X = call <2 x i8*> @test12a()
; CHECK: %1 = bitcast <2 x i8*> %X to <2 x i32*>
%X = call <2 x i32*> bitcast (<2 x i8*> ()* @test12a to <2 x i32*> ()*)()
ret <2 x i32*> %X
}
define <2 x i8 addrspace(1)*> @test12a_mixed_as() {
ret <2 x i8 addrspace(1)*> zeroinitializer
}
define <2 x i8*> @test12_mixed_as() {
; CHECK-LABEL: @test12_mixed_as(
; CHECK: call <2 x i8*> bitcast
%X = call <2 x i8*> bitcast (<2 x i8 addrspace(1)*> ()* @test12a_mixed_as to <2 x i8*> ()*)()
ret <2 x i8*> %X
}
; Mix parameter that's a vector of integers and pointers of the same size
declare void @test13a(<2 x i64>)
define void @test13(<2 x i32*> %A) {
; CHECK-LABEL: @test13(
; CHECK: call void bitcast
call void bitcast (void (<2 x i64>)* @test13a to void (<2 x i32*>)*)(<2 x i32*> %A)
ret void
}
; Mix parameter that's a vector of integers and pointers of the same
; size, but the other way around
declare void @test14a(<2 x i8*>)
define void @test14(<2 x i64> %A) {
; CHECK-LABEL: @test14(
; CHECK: call void bitcast
call void bitcast (void (<2 x i8*>)* @test14a to void (<2 x i64>)*)(<2 x i64> %A)
ret void
}
; Return type that's a vector
define <2 x i16> @test15a() {
ret <2 x i16> zeroinitializer
}
define i32 @test15() {
; CHECK-LABEL: @test15(
; CHECK: %X = call <2 x i16> @test15a()
; CHECK: %1 = bitcast <2 x i16> %X to i32
%X = call i32 bitcast (<2 x i16> ()* @test15a to i32 ()*)( )
ret i32 %X
}
define i32 @test16a() {
ret i32 0
}
define <2 x i16> @test16() {
; CHECK-LABEL: @test16(
; CHECK: %X = call i32 @test16a()
; CHECK: %1 = bitcast i32 %X to <2 x i16>
%X = call <2 x i16> bitcast (i32 ()* @test16a to <2 x i16> ()*)( )
ret <2 x i16> %X
}
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