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https://github.com/c64scene-ar/llvm-6502.git
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2afd045e03
Use a loop instruction with a constant extender for a hardware loop instruction that is too far away from the start of the loop. This is cheaper than changing the SA register value. Differential Revision: http://reviews.llvm.org/D9262 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@235882 91177308-0d34-0410-b5e6-96231b3b80d8
37 lines
997 B
LLVM
37 lines
997 B
LLVM
; RUN: llc -march=hexagon -hexagon-loop-range=0 < %s | FileCheck %s
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; Test that the loop start address operand uses a constant extender
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; if the offset is out of range.
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; CHECK: loop0(##.LBB
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; CHECK: endloop0
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@g = external global i32, align 4
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define void @test(i32* nocapture %a, i32* nocapture readonly %b, i32 %n) #0 {
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entry:
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%cmp6 = icmp slt i32 %n, 1
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br i1 %cmp6, label %for.end, label %for.body.preheader
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for.body.preheader:
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br label %for.body
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for.body:
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%i.07 = phi i32 [ %inc, %for.body ], [ 0, %for.body.preheader ]
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%arrayidx = getelementptr inbounds i32, i32* %b, i32 %i.07
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%0 = load i32, i32* %arrayidx, align 4
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%1 = load i32, i32* @g, align 4
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%mul = mul nsw i32 %1, %0
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%arrayidx1 = getelementptr inbounds i32, i32* %a, i32 %i.07
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store i32 %mul, i32* %arrayidx1, align 4
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%inc = add nuw nsw i32 %i.07, 1
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%exitcond = icmp eq i32 %inc, %n
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br i1 %exitcond, label %for.end.loopexit, label %for.body
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for.end.loopexit:
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br label %for.end
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for.end:
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ret void
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}
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