From 9d1747c3cd709cd5bbc1a07074550862d188527e Mon Sep 17 00:00:00 2001 From: Dan Gohman Date: Wed, 8 Aug 2012 00:00:26 +0000 Subject: Avoid recomputing the unique exit blocks and their insert points when doing multiple scalar promotions on a single loop. This also has the effect of preserving the order of stores sunk out of loops, which is aesthetically pleasing, and it happens to fix the testcase in PR13542, though it doesn't fix the underlying problem. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161459 91177308-0d34-0410-b5e6-96231b3b80d8 --- test/Transforms/LICM/promote-order.ll | 41 +++++++++++++++++++++++++++++++++++ 1 file changed, 41 insertions(+) create mode 100644 test/Transforms/LICM/promote-order.ll (limited to 'test/Transforms') diff --git a/test/Transforms/LICM/promote-order.ll b/test/Transforms/LICM/promote-order.ll new file mode 100644 index 0000000..b016265 --- /dev/null +++ b/test/Transforms/LICM/promote-order.ll @@ -0,0 +1,41 @@ +; RUN: opt -tbaa -basicaa -licm -S < %s | FileCheck %s + +; LICM should keep the stores in their original order when it sinks/promotes them. +; rdar://12045203 + +target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128" +target triple = "x86_64-apple-macosx10.8.0" + +@p = external global i8* + +define i32* @_Z4doiti(i32 %n, float* %tmp1, i32* %tmp3) nounwind { +entry: + %cmp1 = icmp slt i32 0, %n + br i1 %cmp1, label %for.body.lr.ph, label %for.end + +for.body.lr.ph: ; preds = %entry + br label %for.body + +for.body: ; preds = %for.body, %for.body.lr.ph + %i.02 = phi i32 [ 0, %for.body.lr.ph ], [ %inc, %for.body ] + store float 1.000000e+00, float* %tmp1, align 4, !tbaa !1 + store i32 1, i32* %tmp3, align 4, !tbaa !2 + %inc = add nsw i32 %i.02, 1 + %cmp = icmp slt i32 %inc, %n + br i1 %cmp, label %for.body, label %for.cond.for.end_crit_edge + +; CHECK: for.cond.for.end_crit_edge: +; CHECK: store float 1.000000e+00, float* %tmp1 +; CHECK: store i32 1, i32* %tmp3 +for.cond.for.end_crit_edge: ; preds = %for.body + %split = phi i32* [ %tmp3, %for.body ] + br label %for.end + +for.end: ; preds = %for.cond.for.end_crit_edge, %entry + %r.0.lcssa = phi i32* [ %split, %for.cond.for.end_crit_edge ], [ undef, %entry ] + ret i32* %r.0.lcssa +} + +!0 = metadata !{metadata !"minimal TBAA"} +!1 = metadata !{metadata !"float", metadata !0} +!2 = metadata !{metadata !"int", metadata !0} -- cgit v1.1