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| author | Dan Gohman <gohman@apple.com> | 2012-08-08 00:00:26 +0000 |
|---|---|---|
| committer | Dan Gohman <gohman@apple.com> | 2012-08-08 00:00:26 +0000 |
| commit | 9d1747c3cd709cd5bbc1a07074550862d188527e (patch) | |
| tree | 8adb0dc19f7d59b9fa8532e98c6c31857492f912 /test | |
| parent | 8c5c0733cde7c941de6c9386a07a8378c5c482c5 (diff) | |
| download | external_llvm-9d1747c3cd709cd5bbc1a07074550862d188527e.zip external_llvm-9d1747c3cd709cd5bbc1a07074550862d188527e.tar.gz external_llvm-9d1747c3cd709cd5bbc1a07074550862d188527e.tar.bz2 | |
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
Diffstat (limited to 'test')
| -rw-r--r-- | test/Transforms/LICM/promote-order.ll | 41 |
1 files changed, 41 insertions, 0 deletions
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} |