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Diffstat (limited to 'test/Transforms/InstCombine/gc.relocate.ll')
| -rw-r--r-- | test/Transforms/InstCombine/gc.relocate.ll | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/test/Transforms/InstCombine/gc.relocate.ll b/test/Transforms/InstCombine/gc.relocate.ll new file mode 100644 index 0000000..d10ef5f --- /dev/null +++ b/test/Transforms/InstCombine/gc.relocate.ll @@ -0,0 +1,20 @@ +; RUN: opt < %s -datalayout -instcombine -S | FileCheck %s + +; Uses InstCombine with DataLayout to propagate dereferenceable +; attribute via gc.relocate: if the derived ptr is dereferenceable(N), +; then the return attribute of gc.relocate is dereferenceable(N). + +declare zeroext i1 @return_i1() +declare i32 @llvm.experimental.gc.statepoint.p0f_i1f(i1 ()*, i32, i32, ...) +declare i32 addrspace(1)* @llvm.experimental.gc.relocate.p1i32(i32, i32, i32) + +define i32 addrspace(1)* @deref(i32 addrspace(1)* dereferenceable(8) %dparam) { +; Checks that a dereferenceabler pointer +; CHECK-LABEL: @deref +; CHECK: call dereferenceable(8) +entry: + %load = load i32 addrspace(1)* %dparam + %tok = tail call i32 (i1 ()*, i32, i32, ...)* @llvm.experimental.gc.statepoint.p0f_i1f(i1 ()* @return_i1, i32 0, i32 0, i32 0, i32 addrspace(1)* %dparam) + %relocate = call i32 addrspace(1)* @llvm.experimental.gc.relocate.p1i32(i32 %tok, i32 4, i32 4) + ret i32 addrspace(1)* %relocate +}
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