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| author | dim <dim@FreeBSD.org> | 2011-02-20 12:57:14 +0000 |
|---|---|---|
| committer | dim <dim@FreeBSD.org> | 2011-02-20 12:57:14 +0000 |
| commit | cbb70ce070d220642b038ea101d9c0f9fbf860d6 (patch) | |
| tree | d2b61ce94e654cb01a254d2195259db5f9cc3f3c /test/Transforms/SimplifyCFG/speculate-with-offset.ll | |
| parent | 4ace901e87dac5bbbac78ed325e75462e48e386e (diff) | |
| download | FreeBSD-src-cbb70ce070d220642b038ea101d9c0f9fbf860d6.zip FreeBSD-src-cbb70ce070d220642b038ea101d9c0f9fbf860d6.tar.gz | |
Vendor import of llvm trunk r126079:
http://llvm.org/svn/llvm-project/llvm/trunk@126079
Diffstat (limited to 'test/Transforms/SimplifyCFG/speculate-with-offset.ll')
| -rw-r--r-- | test/Transforms/SimplifyCFG/speculate-with-offset.ll | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/test/Transforms/SimplifyCFG/speculate-with-offset.ll b/test/Transforms/SimplifyCFG/speculate-with-offset.ll new file mode 100644 index 0000000..a737d56 --- /dev/null +++ b/test/Transforms/SimplifyCFG/speculate-with-offset.ll @@ -0,0 +1,94 @@ +; RUN: opt -simplifycfg -S < %s | FileCheck %s + +; This load is safe to speculate, as it's from a safe offset +; within an alloca. + +; CHECK: @yes +; CHECK-NOT: br + +define void @yes(i1 %c) nounwind { +entry: + %a = alloca [4 x i64*], align 8 + %__a.addr = getelementptr [4 x i64*]* %a, i64 0, i64 3 + call void @frob(i64** %__a.addr) + br i1 %c, label %if.then, label %if.end + +if.then: ; preds = %entry + br label %return + +if.end: ; preds = %entry + %tmp5 = load i64** %__a.addr, align 8 + br label %return + +return: ; preds = %if.end, %if.then + %storemerge = phi i64* [ undef, %if.then ], [ %tmp5, %if.end ] + ret void +} + +; CHECK: @no0 +; CHECK: br i1 %c + +define void @no0(i1 %c) nounwind { +entry: + %a = alloca [4 x i64*], align 8 + %__a.addr = getelementptr [4 x i64*]* %a, i64 0, i64 4 + call void @frob(i64** %__a.addr) + br i1 %c, label %if.then, label %if.end + +if.then: ; preds = %entry + br label %return + +if.end: ; preds = %entry + %tmp5 = load i64** %__a.addr, align 8 + br label %return + +return: ; preds = %if.end, %if.then + %storemerge = phi i64* [ undef, %if.then ], [ %tmp5, %if.end ] + ret void +} + +; CHECK: @no1 +; CHECK: br i1 %c + +define void @no1(i1 %c, i64 %n) nounwind { +entry: + %a = alloca [4 x i64*], align 8 + %__a.addr = getelementptr [4 x i64*]* %a, i64 0, i64 %n + call void @frob(i64** %__a.addr) + br i1 %c, label %if.then, label %if.end + +if.then: ; preds = %entry + br label %return + +if.end: ; preds = %entry + %tmp5 = load i64** %__a.addr, align 8 + br label %return + +return: ; preds = %if.end, %if.then + %storemerge = phi i64* [ undef, %if.then ], [ %tmp5, %if.end ] + ret void +} + +; CHECK: @no2 +; CHECK: br i1 %c + +define void @no2(i1 %c, i64 %n) nounwind { +entry: + %a = alloca [4 x i64*], align 8 + %__a.addr = getelementptr [4 x i64*]* %a, i64 1, i64 0 + call void @frob(i64** %__a.addr) + br i1 %c, label %if.then, label %if.end + +if.then: ; preds = %entry + br label %return + +if.end: ; preds = %entry + %tmp5 = load i64** %__a.addr, align 8 + br label %return + +return: ; preds = %if.end, %if.then + %storemerge = phi i64* [ undef, %if.then ], [ %tmp5, %if.end ] + ret void +} + +declare void @frob(i64** nocapture %p) |
