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Test for lazy value info's ability to prove the absense of NULLs in pointers. 

llvm-svn: 123601
This commit is contained in:
Nick Lewycky 2011-01-16 21:57:20 +00:00
parent cb0527c20d
commit 872a453ada
1 changed files with 103 additions and 0 deletions
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103
llvm/test/Transforms/CorrelatedValuePropagation/non-null.ll Normal file
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; RUN: opt < %s -correlated-propagation -S | FileCheck %s
define void @test1(i8* %ptr) {
; CHECK: test1
%A = load i8* %ptr
br label %bb
bb:
icmp ne i8* %ptr, null
; CHECK-NOT: icmp
ret void
}
define void @test2(i8* %ptr) {
; CHECK: test2
store i8 0, i8* %ptr
br label %bb
bb:
icmp ne i8* %ptr, null
; CHECK-NOT: icmp
ret void
}
define void @test3() {
; CHECK: test3
%ptr = alloca i8
br label %bb
bb:
icmp ne i8* %ptr, null
; CHECK-NOT: icmp
ret void
}
declare void @llvm.memcpy.p0i8.p0i8.i32(i8*, i8*, i32, i32, i1)
define void @test4(i8* %dest, i8* %src) {
; CHECK: test4
call void @llvm.memcpy.p0i8.p0i8.i32(i8* %dest, i8* %src, i32 1, i32 1, i1 false)
br label %bb
bb:
icmp ne i8* %dest, null
icmp ne i8* %src, null
; CHECK-NOT: icmp
ret void
}
declare void @llvm.memmove.p0i8.p0i8.i32(i8*, i8*, i32, i32, i1)
define void @test5(i8* %dest, i8* %src) {
; CHECK: test5
call void @llvm.memmove.p0i8.p0i8.i32(i8* %dest, i8* %src, i32 1, i32 1, i1 false)
br label %bb
bb:
icmp ne i8* %dest, null
icmp ne i8* %src, null
; CHECK-NOT: icmp
ret void
}
declare void @llvm.memset.p0i8.i32(i8*, i8, i32, i32, i1)
define void @test6(i8* %dest) {
; CHECK: test6
call void @llvm.memset.p0i8.i32(i8* %dest, i8 255, i32 1, i32 1, i1 false)
br label %bb
bb:
icmp ne i8* %dest, null
; CHECK-NOT: icmp
ret void
}
define void @test7(i8* %dest, i8* %src, i32 %len) {
; CHECK: test7
call void @llvm.memcpy.p0i8.p0i8.i32(i8* %dest, i8* %src, i32 %len, i32 1, i1 false)
br label %bb
bb:
%KEEP1 = icmp ne i8* %dest, null
; CHECK: KEEP1
%KEEP2 = icmp ne i8* %src, null
; CHECK: KEEP2
ret void
}
declare void @llvm.memcpy.p1i8.p1i8.i32(i8 addrspace(1) *, i8 addrspace(1) *, i32, i32, i1)
define void @test8(i8 addrspace(1) * %dest, i8 addrspace(1) * %src) {
; CHECK: test8
call void @llvm.memcpy.p1i8.p1i8.i32(i8 addrspace(1) * %dest, i8 addrspace(1) * %src, i32 1, i32 1, i1 false)
br label %bb
bb:
%KEEP1 = icmp ne i8 addrspace(1) * %dest, null
; CHECK: KEEP1
%KEEP2 = icmp ne i8 addrspace(1) * %src, null
; CHECK: KEEP2
ret void
}
define void @test9(i8* %dest, i8* %src) {
; CHECK: test9
call void @llvm.memcpy.p0i8.p0i8.i32(i8* %dest, i8* %src, i32 1, i32 1, i1 true)
br label %bb
bb:
%KEEP1 = icmp ne i8* %dest, null
; CHECK: KEEP1
%KEEP2 = icmp ne i8* %src, null
; CHECK: KEEP2
ret void
}