mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-23 19:23:23 +01:00
55 lines
1.9 KiB
LLVM
55 lines
1.9 KiB
LLVM
|
; RUN: opt -S -instsimplify < %s | FileCheck %s
|
||
|
|
target datalayout = "p:32:32"
|
||
|
|
|
||
|
|
define i1 @test1(i1 %V) {
|
||
|
|
entry:
|
||
|
|
%Z = zext i1 %V to i32
|
||
|
|
%T = trunc i32 %Z to i1
|
||
|
|
ret i1 %T
|
||
|
|
; CHECK-LABEL: define i1 @test1(
|
||
|
|
; CHECK: ret i1 %V
|
||
|
|
}
|
||
|
|
|
||
|
|
define i8* @test2(i8* %V) {
|
||
|
|
entry:
|
||
|
|
%BC1 = bitcast i8* %V to i32*
|
||
|
|
%BC2 = bitcast i32* %BC1 to i8*
|
||
|
|
ret i8* %BC2
|
||
|
|
; CHECK-LABEL: define i8* @test2(
|
||
|
|
; CHECK: ret i8* %V
|
||
|
|
}
|
||
|
|
|
||
|
|
define i8* @test3(i8* %V) {
|
||
|
|
entry:
|
||
|
|
%BC = bitcast i8* %V to i8*
|
||
|
|
ret i8* %BC
|
||
|
|
; CHECK-LABEL: define i8* @test3(
|
||
|
|
; CHECK: ret i8* %V
|
||
|
|
}
|
||
|
|
|
||
|
|
define i32 @test4() {
|
||
|
|
; CHECK-LABEL: @test4(
|
||
|
|
%alloca = alloca i32, align 4 ; alloca + 0
|
||
|
|
%gep = getelementptr inbounds i32, i32* %alloca, i32 1 ; alloca + 4
|
||
|
|
%bc = bitcast i32* %gep to [4 x i8]* ; alloca + 4
|
||
|
|
%pti = ptrtoint i32* %alloca to i32 ; alloca
|
||
|
|
%sub = sub i32 0, %pti ; -alloca
|
||
|
|
%add = getelementptr [4 x i8], [4 x i8]* %bc, i32 0, i32 %sub ; alloca + 4 - alloca == 4
|
||
|
|
%add_to_int = ptrtoint i8* %add to i32 ; 4
|
||
|
|
ret i32 %add_to_int ; 4
|
||
|
|
; CHECK-NEXT: ret i32 4
|
||
|
|
}
|
||
|
|
|
||
|
|
define i32 @test5() {
|
||
|
|
; CHECK-LABEL: @test5(
|
||
|
|
%alloca = alloca i32, align 4 ; alloca + 0
|
||
|
|
%gep = getelementptr inbounds i32, i32* %alloca, i32 1 ; alloca + 4
|
||
|
|
%bc = bitcast i32* %gep to [4 x i8]* ; alloca + 4
|
||
|
|
%pti = ptrtoint i32* %alloca to i32 ; alloca
|
||
|
|
%sub = xor i32 %pti, -1 ; ~alloca
|
||
|
|
%add = getelementptr [4 x i8], [4 x i8]* %bc, i32 0, i32 %sub ; alloca + 4 - alloca - 1 == 3
|
||
|
|
%add_to_int = ptrtoint i8* %add to i32 ; 4
|
||
|
|
ret i32 %add_to_int ; 4
|
||
|
|
; CHECK-NEXT: ret i32 3
|
||
|
|
}
|