llvm/test/Transforms/LICM/2011-07-06-Alignment.ll
Tobias Grosser df7102b7d6 LICM: Do not loose alignment on promotion
The promotion code lost any alignment information, when hoisting loads and
stores out of the loop. This lead to incorrect aligned memory accesses. We now
use the largest alignment we can prove to be correct.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134520 91177308-0d34-0410-b5e6-96231b3b80d8
2011-07-06 19:19:55 +00:00

27 lines
638 B
LLVM

; RUN: opt -licm -S %s | FileCheck %s
@A = common global [1024 x float] zeroinitializer, align 4
define i32 @main() nounwind {
entry:
br label %for.cond
for.cond:
%indvar = phi i64 [ %indvar.next, %for.body ], [ 0, %entry ]
%arrayidx = getelementptr [1024 x float]* @A, i64 0, i64 3
%vecidx = bitcast float* %arrayidx to <4 x float>*
store <4 x float> zeroinitializer, <4 x float>* %vecidx, align 4
%indvar.next = add i64 %indvar, 1
%exitcond = icmp ne i64 %indvar, 1024
br i1 %exitcond, label %for.body, label %for.end
for.body:
br label %for.cond
for.end:
ret i32 0
}
;CHECK: store <4 x float> {{.*}} align 4