mirror of
https://github.com/RPCS3/llvm-mirror.git
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baafd4c214
Example:
while (buf !=end ) {
S += buf[0];
S += buf[1];
buf +=2;
};
Differential Revision: http://reviews.llvm.org/D13151
llvm-svn: 258709
82 lines
3.1 KiB
LLVM
82 lines
3.1 KiB
LLVM
; RUN: opt -S -loop-reroll %s | FileCheck %s
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target triple = "aarch64--linux-gnu"
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define i32 @test(i32* readonly %buf, i32* readnone %end) #0 {
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entry:
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%cmp.9 = icmp eq i32* %buf, %end
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br i1 %cmp.9, label %while.end, label %while.body.preheader
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while.body.preheader:
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br label %while.body
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while.body:
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;CHECK-LABEL: while.body:
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;CHECK-NEXT: %indvar = phi i64 [ %indvar.next, %while.body ], [ 0, %while.body.preheader ]
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;CHECK-NEXT: %S.011 = phi i32 [ %add, %while.body ], [ undef, %while.body.preheader ]
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;CHECK-NEXT: %scevgep = getelementptr i32, i32* %buf, i64 %indvar
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;CHECK-NEXT: %4 = load i32, i32* %scevgep, align 4
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;CHECK-NEXT: %add = add nsw i32 %4, %S.011
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;CHECK-NEXT: %indvar.next = add i64 %indvar, 1
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;CHECK-NEXT: %exitcond = icmp eq i32* %scevgep, %scevgep5
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;CHECK-NEXT: br i1 %exitcond, label %while.end.loopexit, label %while.body
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%S.011 = phi i32 [ %add2, %while.body ], [ undef, %while.body.preheader ]
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%buf.addr.010 = phi i32* [ %add.ptr, %while.body ], [ %buf, %while.body.preheader ]
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%0 = load i32, i32* %buf.addr.010, align 4
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%add = add nsw i32 %0, %S.011
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%arrayidx1 = getelementptr inbounds i32, i32* %buf.addr.010, i64 1
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%1 = load i32, i32* %arrayidx1, align 4
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%add2 = add nsw i32 %add, %1
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%add.ptr = getelementptr inbounds i32, i32* %buf.addr.010, i64 2
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%cmp = icmp eq i32* %add.ptr, %end
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br i1 %cmp, label %while.end.loopexit, label %while.body
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while.end.loopexit:
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%add2.lcssa = phi i32 [ %add2, %while.body ]
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br label %while.end
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while.end:
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%S.0.lcssa = phi i32 [ undef, %entry ], [ %add2.lcssa, %while.end.loopexit ]
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ret i32 %S.0.lcssa
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}
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define i32 @test2(i32* readonly %buf, i32* readnone %end) #0 {
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entry:
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%cmp.9 = icmp eq i32* %buf, %end
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br i1 %cmp.9, label %while.end, label %while.body.preheader
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while.body.preheader:
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br label %while.body
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while.body:
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;CHECK-LABEL: while.body:
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;CHECK-NEXT: %indvar = phi i64 [ %indvar.next, %while.body ], [ 0, %while.body.preheader ]
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;CHECK-NEXT: %S.011 = phi i32 [ %add, %while.body ], [ undef, %while.body.preheader ]
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;CHECK-NEXT: %4 = mul i64 %indvar, -1
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;CHECK-NEXT: %scevgep = getelementptr i32, i32* %buf, i64 %4
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;CHECK-NEXT: %5 = load i32, i32* %scevgep, align 4
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;CHECK-NEXT: %add = add nsw i32 %5, %S.011
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;CHECK-NEXT: %indvar.next = add i64 %indvar, 1
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;CHECK-NEXT: %exitcond = icmp eq i32* %scevgep, %scevgep5
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;CHECK-NEXT: br i1 %exitcond, label %while.end.loopexit, label %while.body
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%S.011 = phi i32 [ %add2, %while.body ], [ undef, %while.body.preheader ]
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%buf.addr.010 = phi i32* [ %add.ptr, %while.body ], [ %buf, %while.body.preheader ]
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%0 = load i32, i32* %buf.addr.010, align 4
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%add = add nsw i32 %0, %S.011
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%arrayidx1 = getelementptr inbounds i32, i32* %buf.addr.010, i64 -1
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%1 = load i32, i32* %arrayidx1, align 4
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%add2 = add nsw i32 %add, %1
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%add.ptr = getelementptr inbounds i32, i32* %buf.addr.010, i64 -2
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%cmp = icmp eq i32* %add.ptr, %end
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br i1 %cmp, label %while.end.loopexit, label %while.body
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while.end.loopexit:
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%add2.lcssa = phi i32 [ %add2, %while.body ]
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br label %while.end
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while.end:
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%S.0.lcssa = phi i32 [ undef, %entry ], [ %add2.lcssa, %while.end.loopexit ]
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ret i32 %S.0.lcssa
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}
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