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author | Eli Friedman <eli.friedman@gmail.com> | 2011-07-20 21:37:47 +0000 |
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committer | Eli Friedman <eli.friedman@gmail.com> | 2011-07-20 21:37:47 +0000 |
commit | 73bfa4aecf25da5d37261c9ad608ba88b20e0860 (patch) | |
tree | 681fb46e48ebac3265457734ef5ecf1fad0fcab2 /test/Transforms/LICM | |
parent | 5b60e1b6fc5bdce06599512069037944f2194703 (diff) | |
download | external_llvm-73bfa4aecf25da5d37261c9ad608ba88b20e0860.zip external_llvm-73bfa4aecf25da5d37261c9ad608ba88b20e0860.tar.gz external_llvm-73bfa4aecf25da5d37261c9ad608ba88b20e0860.tar.bz2 |
Bring LICM into compliance with the new "Memory Model for Concurrent Operations" in LangRef.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135625 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Transforms/LICM')
-rw-r--r-- | test/Transforms/LICM/scalar-promote-memmodel.ll | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/test/Transforms/LICM/scalar-promote-memmodel.ll b/test/Transforms/LICM/scalar-promote-memmodel.ll new file mode 100644 index 0000000..23d70f5 --- /dev/null +++ b/test/Transforms/LICM/scalar-promote-memmodel.ll @@ -0,0 +1,37 @@ +; RUN: opt < %s -basicaa -licm -S | FileCheck %s + +; Make sure we don't hoist a conditionally-executed store out of the loop; +; it would violate the concurrency memory model + +@g = common global i32 0, align 4 + +define void @bar(i32 %n, i32 %b) nounwind uwtable ssp { +entry: + br label %for.cond + +for.cond: ; preds = %for.inc, %entry + %i.0 = phi i32 [ 0, %entry ], [ %inc5, %for.inc ] + %cmp = icmp slt i32 %i.0, %n + br i1 %cmp, label %for.body, label %for.end + +for.body: ; preds = %for.cond + %tobool = icmp eq i32 %b, 0 + br i1 %tobool, label %for.inc, label %if.then + +if.then: ; preds = %for.body + %tmp3 = load i32* @g, align 4 + %inc = add nsw i32 %tmp3, 1 + store i32 %inc, i32* @g, align 4 + br label %for.inc + +; CHECK: load i32* +; CHECK-NEXT: add +; CHECK-NEXT: store i32 + +for.inc: ; preds = %for.body, %if.then + %inc5 = add nsw i32 %i.0, 1 + br label %for.cond + +for.end: ; preds = %for.cond + ret void +} |