diff options
Diffstat (limited to 'llvm/test/Transforms/SimplifyCFG/duplicate-phis.ll')
| -rw-r--r-- | llvm/test/Transforms/SimplifyCFG/duplicate-phis.ll | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/llvm/test/Transforms/SimplifyCFG/duplicate-phis.ll b/llvm/test/Transforms/SimplifyCFG/duplicate-phis.ll new file mode 100644 index 00000000000..4788406fc0f --- /dev/null +++ b/llvm/test/Transforms/SimplifyCFG/duplicate-phis.ll @@ -0,0 +1,21 @@ +; RUN: opt < %s -instcombine -simplifycfg -S | grep " = phi " | count 1 + +; instcombine should sort the PHI operands so that simplifycfg can see the +; duplicate and remove it. + +define i32 @foo(i1 %t) { +entry: + call void @bar() + br i1 %t, label %true, label %false +true: + call void @bar() + br label %false +false: + %a = phi i32 [ 2, %true ], [ 5, %entry ] + %b = phi i32 [ 5, %entry ], [ 2, %true ] + call void @bar() + %c = add i32 %a, %b + ret i32 %c +} + +declare void @bar() |
