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author | rdivacky <rdivacky@FreeBSD.org> | 2009-10-14 17:57:32 +0000 |
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committer | rdivacky <rdivacky@FreeBSD.org> | 2009-10-14 17:57:32 +0000 |
commit | cd749a9c07f1de2fb8affde90537efa4bc3e7c54 (patch) | |
tree | b21f6de4e08b89bb7931806bab798fc2a5e3a686 /test/Transforms/LoopUnswitch/preserve-analyses.ll | |
parent | 72621d11de5b873f1695f391eb95f0b336c3d2d4 (diff) | |
download | FreeBSD-src-cd749a9c07f1de2fb8affde90537efa4bc3e7c54.zip FreeBSD-src-cd749a9c07f1de2fb8affde90537efa4bc3e7c54.tar.gz |
Update llvm to r84119.
Diffstat (limited to 'test/Transforms/LoopUnswitch/preserve-analyses.ll')
-rw-r--r-- | test/Transforms/LoopUnswitch/preserve-analyses.ll | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/test/Transforms/LoopUnswitch/preserve-analyses.ll b/test/Transforms/LoopUnswitch/preserve-analyses.ll new file mode 100644 index 0000000..3364fb2 --- /dev/null +++ b/test/Transforms/LoopUnswitch/preserve-analyses.ll @@ -0,0 +1,129 @@ +; RUN: opt -loop-unswitch -verify-loop-info -verify-dom-info %s -disable-output + +; Loop unswitch should be able to unswitch these loops and +; preserve LCSSA and LoopSimplify forms. + +target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:32-f32:32:32-f64:32:32-v64:64:64-v128:128:128-a0:0:64" +target triple = "armv6-apple-darwin9" + +@delim1 = external global i32 ; <i32*> [#uses=1] +@delim2 = external global i32 ; <i32*> [#uses=1] + +define arm_apcscc i32 @ineqn(i8* %s, i8* %p) nounwind readonly { +entry: + %0 = load i32* @delim1, align 4 ; <i32> [#uses=1] + %1 = load i32* @delim2, align 4 ; <i32> [#uses=1] + br label %bb8.outer + +bb: ; preds = %bb8 + %2 = icmp eq i8* %p_addr.0, %s ; <i1> [#uses=1] + br i1 %2, label %bb10, label %bb2 + +bb2: ; preds = %bb + %3 = getelementptr inbounds i8* %p_addr.0, i32 1 ; <i8*> [#uses=3] + switch i32 %ineq.0.ph, label %bb8.backedge [ + i32 0, label %bb3 + i32 1, label %bb6 + ] + +bb8.backedge: ; preds = %bb6, %bb5, %bb2 + br label %bb8 + +bb3: ; preds = %bb2 + %4 = icmp eq i32 %8, %0 ; <i1> [#uses=1] + br i1 %4, label %bb8.outer.loopexit, label %bb5 + +bb5: ; preds = %bb3 + br i1 %6, label %bb6, label %bb8.backedge + +bb6: ; preds = %bb5, %bb2 + %5 = icmp eq i32 %8, %1 ; <i1> [#uses=1] + br i1 %5, label %bb7, label %bb8.backedge + +bb7: ; preds = %bb6 + %.lcssa1 = phi i8* [ %3, %bb6 ] ; <i8*> [#uses=1] + br label %bb8.outer.backedge + +bb8.outer.backedge: ; preds = %bb8.outer.loopexit, %bb7 + %.lcssa2 = phi i8* [ %.lcssa1, %bb7 ], [ %.lcssa, %bb8.outer.loopexit ] ; <i8*> [#uses=1] + %ineq.0.ph.be = phi i32 [ 0, %bb7 ], [ 1, %bb8.outer.loopexit ] ; <i32> [#uses=1] + br label %bb8.outer + +bb8.outer.loopexit: ; preds = %bb3 + %.lcssa = phi i8* [ %3, %bb3 ] ; <i8*> [#uses=1] + br label %bb8.outer.backedge + +bb8.outer: ; preds = %bb8.outer.backedge, %entry + %ineq.0.ph = phi i32 [ 0, %entry ], [ %ineq.0.ph.be, %bb8.outer.backedge ] ; <i32> [#uses=3] + %p_addr.0.ph = phi i8* [ %p, %entry ], [ %.lcssa2, %bb8.outer.backedge ] ; <i8*> [#uses=1] + %6 = icmp eq i32 %ineq.0.ph, 1 ; <i1> [#uses=1] + br label %bb8 + +bb8: ; preds = %bb8.outer, %bb8.backedge + %p_addr.0 = phi i8* [ %p_addr.0.ph, %bb8.outer ], [ %3, %bb8.backedge ] ; <i8*> [#uses=3] + %7 = load i8* %p_addr.0, align 1 ; <i8> [#uses=2] + %8 = sext i8 %7 to i32 ; <i32> [#uses=2] + %9 = icmp eq i8 %7, 0 ; <i1> [#uses=1] + br i1 %9, label %bb10, label %bb + +bb10: ; preds = %bb8, %bb + %.0 = phi i32 [ %ineq.0.ph, %bb ], [ 0, %bb8 ] ; <i32> [#uses=1] + ret i32 %.0 +} + +; This is a simplified form of ineqn from above. It triggers some +; different cases in the loop-unswitch code. + +define void @simplified_ineqn() nounwind readonly { +entry: + br label %bb8.outer + +bb8.outer: ; preds = %bb6, %bb2, %entry + %x = phi i32 [ 0, %entry ], [ 0, %bb6 ], [ 1, %bb2 ] ; <i32> [#uses=1] + br i1 undef, label %return, label %bb2 + +bb2: ; preds = %bb + switch i32 %x, label %bb6 [ + i32 0, label %bb8.outer + ] + +bb6: ; preds = %bb2 + br i1 undef, label %bb8.outer, label %bb2 + +return: ; preds = %bb8, %bb + ret void +} + +; This function requires special handling to preserve LCSSA form. +; PR4934 + +define void @pnp_check_irq() nounwind noredzone { +entry: + %conv56 = trunc i64 undef to i32 ; <i32> [#uses=1] + br label %while.cond.i + +while.cond.i: ; preds = %while.cond.i.backedge, %entry + %call.i25 = call i8* @pci_get_device() nounwind noredzone ; <i8*> [#uses=2] + br i1 undef, label %if.then65, label %while.body.i + +while.body.i: ; preds = %while.cond.i + br i1 undef, label %if.then31.i.i, label %while.cond.i.backedge + +while.cond.i.backedge: ; preds = %if.then31.i.i, %while.body.i + br label %while.cond.i + +if.then31.i.i: ; preds = %while.body.i + switch i32 %conv56, label %while.cond.i.backedge [ + i32 14, label %if.then42.i.i + i32 15, label %if.then42.i.i + ] + +if.then42.i.i: ; preds = %if.then31.i.i, %if.then31.i.i + %call.i25.lcssa48 = phi i8* [ %call.i25, %if.then31.i.i ], [ %call.i25, %if.then31.i.i ] ; <i8*> [#uses=0] + unreachable + +if.then65: ; preds = %while.cond.i + unreachable +} + +declare i8* @pci_get_device() noredzone |