mirror of
https://github.com/c64scene-ar/llvm-6502.git
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a10756ee65
This new version is much more aggressive about doing "full" reduction in cases where it reduces register pressure, and also more aggressive about rewriting induction variables to count down (or up) to zero when doing so reduces register pressure. It currently uses fairly simplistic algorithms for finding reuse opportunities, but it introduces a new framework allows it to combine multiple strategies at once to form hybrid solutions, instead of doing all full-reduction or all base+index. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@94061 91177308-0d34-0410-b5e6-96231b3b80d8
61 lines
2.4 KiB
LLVM
61 lines
2.4 KiB
LLVM
; RUN: llc < %s -stats |& grep {39.*Number of machine instrs printed}
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; RUN: llc < %s -stats |& not grep {.*Number of re-materialization}
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; This test really wants to check that the resultant "cond_true" block only
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; has a single store in it, and that cond_true55 only has code to materialize
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; the constant and do a store. We do *not* want something like this:
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;
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;LBB1_3: @cond_true
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; add r8, r0, r6
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; str r10, [r8, #+4]
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;
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target triple = "arm-apple-darwin8"
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define void @foo(i32* %mc, i32* %mpp, i32* %ip, i32* %dpp, i32* %tpmm, i32 %M, i32* %tpim, i32* %tpdm, i32* %bp, i32* %ms, i32 %xmb) {
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entry:
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%tmp6584 = icmp slt i32 %M, 1 ; <i1> [#uses=1]
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br i1 %tmp6584, label %return, label %bb
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bb: ; preds = %cond_next59, %entry
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%indvar = phi i32 [ 0, %entry ], [ %k.069.0, %cond_next59 ] ; <i32> [#uses=6]
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%k.069.0 = add i32 %indvar, 1 ; <i32> [#uses=3]
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%tmp3 = getelementptr i32* %mpp, i32 %indvar ; <i32*> [#uses=1]
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%tmp4 = load i32* %tmp3 ; <i32> [#uses=1]
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%tmp8 = getelementptr i32* %tpmm, i32 %indvar ; <i32*> [#uses=1]
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%tmp9 = load i32* %tmp8 ; <i32> [#uses=1]
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%tmp10 = add i32 %tmp9, %tmp4 ; <i32> [#uses=2]
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%tmp13 = getelementptr i32* %mc, i32 %k.069.0 ; <i32*> [#uses=5]
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store i32 %tmp10, i32* %tmp13
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%tmp17 = getelementptr i32* %ip, i32 %indvar ; <i32*> [#uses=1]
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%tmp18 = load i32* %tmp17 ; <i32> [#uses=1]
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%tmp22 = getelementptr i32* %tpim, i32 %indvar ; <i32*> [#uses=1]
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%tmp23 = load i32* %tmp22 ; <i32> [#uses=1]
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%tmp24 = add i32 %tmp23, %tmp18 ; <i32> [#uses=2]
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%tmp30 = icmp sgt i32 %tmp24, %tmp10 ; <i1> [#uses=1]
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br i1 %tmp30, label %cond_true, label %cond_next
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cond_true: ; preds = %bb
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store i32 %tmp24, i32* %tmp13
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br label %cond_next
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cond_next: ; preds = %cond_true, %bb
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%tmp39 = load i32* %tmp13 ; <i32> [#uses=1]
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%tmp42 = getelementptr i32* %ms, i32 %k.069.0 ; <i32*> [#uses=1]
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%tmp43 = load i32* %tmp42 ; <i32> [#uses=1]
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%tmp44 = add i32 %tmp43, %tmp39 ; <i32> [#uses=2]
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store i32 %tmp44, i32* %tmp13
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%tmp52 = icmp slt i32 %tmp44, -987654321 ; <i1> [#uses=1]
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br i1 %tmp52, label %cond_true55, label %cond_next59
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cond_true55: ; preds = %cond_next
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store i32 -987654321, i32* %tmp13
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br label %cond_next59
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cond_next59: ; preds = %cond_true55, %cond_next
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%tmp61 = add i32 %indvar, 2 ; <i32> [#uses=1]
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%tmp65 = icmp sgt i32 %tmp61, %M ; <i1> [#uses=1]
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br i1 %tmp65, label %return, label %bb
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return: ; preds = %cond_next59, %entry
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ret void
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}
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