44 lines
1.6 KiB
LLVM
44 lines
1.6 KiB
LLVM
; RUN: opt -S -basicaa -gvn < %s | FileCheck %s
|
|
|
|
target datalayout = "e-m:o-p:32:32-f64:32:64-f80:128-n8:16:32-S128"
|
|
target triple = "i386-apple-macosx10.6.0"
|
|
|
|
; The load and store address in the loop body could alias so the load
|
|
; can't be hoisted above the store and out of the loop.
|
|
|
|
declare void @llvm.memset.p0i8.i32(i8* nocapture writeonly, i8, i32, i1)
|
|
|
|
define i32 @foo(i32 %x, i32 %z, i32 %n) {
|
|
entry:
|
|
%pool = alloca [59 x i32], align 4
|
|
%tmp = bitcast [59 x i32]* %pool to i8*
|
|
call void @llvm.memset.p0i8.i32(i8* align 4 nonnull %tmp, i8 0, i32 236, i1 false)
|
|
%cmp3 = icmp eq i32 %n, 0
|
|
br i1 %cmp3, label %for.end, label %for.body.lr.ph
|
|
|
|
for.body.lr.ph: ; preds = %entry
|
|
%add = add i32 %z, %x
|
|
%and = and i32 %add, 2147483647
|
|
%sub = add nsw i32 %and, -2137521902
|
|
%arrayidx = getelementptr inbounds [59 x i32], [59 x i32]* %pool, i32 0, i32 %sub
|
|
%arrayidx1 = getelementptr inbounds [59 x i32], [59 x i32]* %pool, i32 0, i32 42
|
|
br label %for.body
|
|
|
|
for.body: ; preds = %for.body.lr.ph, %for.body
|
|
%i.04 = phi i32 [ 0, %for.body.lr.ph ], [ %inc, %for.body ]
|
|
store i32 %i.04, i32* %arrayidx, align 4
|
|
%tmp1 = load i32, i32* %arrayidx1, align 4
|
|
%inc = add nuw i32 %i.04, 1
|
|
%exitcond = icmp ne i32 %inc, %n
|
|
br i1 %exitcond, label %for.body, label %for.end.loopexit
|
|
|
|
for.end.loopexit: ; preds = %for.body
|
|
%lcssa = phi i32 [ %tmp1, %for.body ]
|
|
br label %for.end
|
|
|
|
for.end: ; preds = %for.end.loopexit, %entry
|
|
%s = phi i32 [ 0, %entry ], [ %lcssa, %for.end.loopexit ]
|
|
; CHECK: ret i32 %s
|
|
ret i32 %s
|
|
}
|