diff options
Diffstat (limited to 'llvm/test/Transforms/SimpleLoopUnswitch/2015-09-18-Addrspace.ll')
| -rw-r--r-- | llvm/test/Transforms/SimpleLoopUnswitch/2015-09-18-Addrspace.ll | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/llvm/test/Transforms/SimpleLoopUnswitch/2015-09-18-Addrspace.ll b/llvm/test/Transforms/SimpleLoopUnswitch/2015-09-18-Addrspace.ll new file mode 100644 index 00000000000..c8de642a5d0 --- /dev/null +++ b/llvm/test/Transforms/SimpleLoopUnswitch/2015-09-18-Addrspace.ll @@ -0,0 +1,29 @@ +; RUN: opt < %s -simple-loop-unswitch -S | FileCheck %s +; RUN: opt < %s -simple-loop-unswitch -enable-mssa-loop-dependency=true -verify-memoryssa -S | FileCheck %s + +; In cases where two address spaces do not have the same size pointer, the +; input for the addrspacecast should not be used as a substitute for itself +; when manipulating the pointer. + +target datalayout = "e-m:e-p:16:16-p1:32:16-i32:16-i64:16-n8:16" + +define void @foo() { +; CHECK-LABEL: @foo +entry: + %arrayidx.i1 = getelementptr inbounds i16, i16* undef, i16 undef + %arrayidx.i = addrspacecast i16* %arrayidx.i1 to i16 addrspace(1)* + br i1 undef, label %for.body.i, label %bar.exit + +for.body.i: ; preds = %for.body.i, %entry +; When we call makeLoopInvariant (i.e. trivial LICM) on this load, it +; will try to find the base object to prove deferenceability. If we look +; through the addrspacecast, we'll fail an assertion about bitwidths matching +; CHECK-LABEL: for.body.i +; CHECK: %0 = load i16, i16 addrspace(1)* %arrayidx.i, align 2 + %0 = load i16, i16 addrspace(1)* %arrayidx.i, align 2 + %cmp1.i = icmp eq i16 %0, 0 + br i1 %cmp1.i, label %bar.exit, label %for.body.i + +bar.exit: ; preds = %for.body.i, %entry + ret void +} |
