derek.holloway
7502bf64a4
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31 lines
1005 B
LLVM
31 lines
1005 B
LLVM
; REQUIRES: asserts
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; RUN: opt %s -disable-output -passes=loop-reduce -S -debug-only=loop-reduce 2>&1 | FileCheck %s
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target triple = "aarch64-unknown-linux-gnu"
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; Regression test to ensure that a negative scalable offset like `-4 * vscale`
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; with a type of i32 is correctly sign extended to 64-bits in ExtractImmediateOperand.
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; CHECK-NOT: vscale x 4294967292
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define void @vscale_neg_offset(ptr %ptr, i32 %0, i32 %n) #0 {
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entry:
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%vscale = tail call i32 @llvm.vscale.i32()
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%start = mul nuw i32 %vscale, -4
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%off = shl i32 %vscale, 4
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br label %vector.body
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vector.body:
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%iv = phi i32 [ %start, %entry ], [ %iv.next, %vector.body ]
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%gep.part0 = getelementptr [4 x i8], ptr %ptr, i32 %iv
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%data = load <vscale x 4 x i32>, ptr %gep.part0, align 4
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store <vscale x 4 x i32> %data, ptr %gep.part0, align 4
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%iv.next = add nuw i32 %iv, 1
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%exit.cond = icmp eq i32 %iv.next, %n
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br i1 %exit.cond, label %exit, label %vector.body
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exit:
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ret void
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}
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attributes #0 = { "target-features"="+sve" }
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