mirror of
https://github.com/RPCSX/llvm.git
synced 2024-12-05 02:16:46 +00:00
212ab28e02
Add a testcase to ensure that if we can't find bounds for a necessary memcheck we don't distribute. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@244703 91177308-0d34-0410-b5e6-96231b3b80d8
58 lines
1.6 KiB
LLVM
58 lines
1.6 KiB
LLVM
; RUN: opt -basicaa -loop-distribute -S < %s | FileCheck %s
|
|
|
|
; If we can't find the bounds for one of the arrays in order to generate the
|
|
; memchecks (e.g., C[i * i] below), loop shold not get distributed.
|
|
;
|
|
; for (i = 0; i < n; i++) {
|
|
; A[i + 1] = A[i] * 3;
|
|
; -------------------------------
|
|
; C[i * i] = B[i] * 2;
|
|
; }
|
|
|
|
target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
|
|
|
|
; Verify that we didn't distribute by checking that we still have the original
|
|
; number of branches.
|
|
|
|
@A = common global i32* null, align 8
|
|
@B = common global i32* null, align 8
|
|
@C = common global i32* null, align 8
|
|
|
|
define void @f() {
|
|
entry:
|
|
%a = load i32*, i32** @A, align 8
|
|
%b = load i32*, i32** @B, align 8
|
|
%c = load i32*, i32** @C, align 8
|
|
br label %for.body
|
|
; CHECK: br
|
|
|
|
for.body: ; preds = %for.body, %entry
|
|
%ind = phi i64 [ 0, %entry ], [ %add, %for.body ]
|
|
|
|
%arrayidxA = getelementptr inbounds i32, i32* %a, i64 %ind
|
|
%loadA = load i32, i32* %arrayidxA, align 4
|
|
|
|
%mulA = mul i32 %loadA, 3
|
|
|
|
%add = add nuw nsw i64 %ind, 1
|
|
%arrayidxA_plus_4 = getelementptr inbounds i32, i32* %a, i64 %add
|
|
store i32 %mulA, i32* %arrayidxA_plus_4, align 4
|
|
|
|
%arrayidxB = getelementptr inbounds i32, i32* %b, i64 %ind
|
|
%loadB = load i32, i32* %arrayidxB, align 4
|
|
|
|
%mulC = mul i32 %loadB, 2
|
|
|
|
%ind_2 = mul i64 %ind, %ind
|
|
%arrayidxC = getelementptr inbounds i32, i32* %c, i64 %ind_2
|
|
store i32 %mulC, i32* %arrayidxC, align 4
|
|
|
|
%exitcond = icmp eq i64 %add, 20
|
|
br i1 %exitcond, label %for.end, label %for.body
|
|
; CHECK: br
|
|
; CHECK-NOT: br
|
|
|
|
for.end: ; preds = %for.body
|
|
ret void
|
|
}
|