RPCS3/llvm-mirror
1
0
Fork 0
mirror of https://github.com/RPCS3/llvm-mirror.git synced 2024-11-26 04:40:38 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

[BasicAA] Add a test for PR24468 to be sure we won't regress

Browse Source 
when we finally get the GEP aliasing right.

llvm-svn: 245395
This commit is contained in:
Quentin Colombet 2015-08-19 00:08:26 +00:00
parent 4d87d8b5ee
commit 11c9d865cc
1 changed files with 48 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

48
test/Analysis/BasicAA/gep-alias.ll
View File

@ -228,3 +228,51 @@ define i32 @test12(i32 %x, i32 %y, i8* %p) nounwind {
; CHECK-LABEL: @test12(
; CHECK: ret i32 %r
}
@P = internal global i32 715827882, align 4
@Q = internal global i32 715827883, align 4
@.str = private unnamed_addr constant [7 x i8] c"%u %u\0A\00", align 1
; Make sure we recognize that u[0] and u[Global + Cst] may alias
; when the addition has wrapping semantic.
; PR24468.
; CHECK-LABEL: @test13(
; Make sure the stores appear before the related loads.
; CHECK: store i8 42,
; CHECK: store i8 99,
; Find the loads and make sure they are used in the arguments to the printf.
; CHECK: [[T0ADDR:%[a-zA-Z0-9_]+]] = getelementptr inbounds [3 x i8], [3 x i8]* %t, i32 0, i32 0
; CHECK: [[T0:%[a-zA-Z0-9_]+]] = load i8, i8* [[T0ADDR]], align 1
; CHECK: [[T0ARG:%[a-zA-Z0-9_]+]] = zext i8 [[T0]] to i32
; CHECK: [[U0ADDR:%[a-zA-Z0-9_]+]] = getelementptr inbounds [3 x i8], [3 x i8]* %u, i32 0, i32 0
; CHECK: [[U0:%[a-zA-Z0-9_]+]] = load i8, i8* [[U0ADDR]], align 1
; CHECK: [[U0ARG:%[a-zA-Z0-9_]+]] = zext i8 [[U0]] to i32
; CHECK: call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str, i32 0, i32 0), i32 [[T0ARG]], i32 [[U0ARG]])
; CHECK: ret
define void @test13() {
entry:
%t = alloca [3 x i8], align 1
%u = alloca [3 x i8], align 1
%tmp = load i32, i32* @P, align 4
%tmp1 = mul i32 %tmp, 3
%mul = add i32 %tmp1, -2147483646
%idxprom = zext i32 %mul to i64
%arrayidx = getelementptr inbounds [3 x i8], [3 x i8]* %t, i64 0, i64 %idxprom
store i8 42, i8* %arrayidx, align 1
%tmp2 = load i32, i32* @Q, align 4
%tmp3 = mul i32 %tmp2, 3
%mul2 = add i32 %tmp3, 2147483647
%idxprom3 = zext i32 %mul2 to i64
%arrayidx4 = getelementptr inbounds [3 x i8], [3 x i8]* %u, i64 0, i64 %idxprom3
store i8 99, i8* %arrayidx4, align 1
%arrayidx5 = getelementptr inbounds [3 x i8], [3 x i8]* %t, i64 0, i64 0
%tmp4 = load i8, i8* %arrayidx5, align 1
%conv = zext i8 %tmp4 to i32
%arrayidx6 = getelementptr inbounds [3 x i8], [3 x i8]* %u, i64 0, i64 0
%tmp5 = load i8, i8* %arrayidx6, align 1
%conv7 = zext i8 %tmp5 to i32
%call = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str, i64 0, i64 0), i32 %conv, i32 %conv7)
ret void
}
declare i32 @printf(i8*, ...)