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Diffstat (limited to 'test/CodeGen/X86/tail-threshold.ll')
-rw-r--r-- | test/CodeGen/X86/tail-threshold.ll | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/test/CodeGen/X86/tail-threshold.ll b/test/CodeGen/X86/tail-threshold.ll new file mode 100644 index 0000000000..9541c01a4f --- /dev/null +++ b/test/CodeGen/X86/tail-threshold.ll @@ -0,0 +1,41 @@ +; RUN: llc -march=x86-64 %s -stats -tail-merge-threshold 2 -o /dev/null |& FileCheck %s + +; Test that we still do some merging if a block has more than +; tail-merge-threshold predecessors. + +; CHECK: 2 branchfolding - Number of block tails merged + +declare void @bar() + +define void @foo(i32 %xxx) { +entry: + switch i32 %xxx, label %bb4 [ + i32 0, label %bb0 + i32 1, label %bb1 + i32 2, label %bb2 + i32 3, label %bb3 + ] + +bb0: + call void @bar() + br label %bb5 + +bb1: + call void @bar() + br label %bb5 + +bb2: + call void @bar() + br label %bb5 + +bb3: + call void @bar() + br label %bb5 + +bb4: + call void @bar() + br label %bb5 + +bb5: + ret void +} |