diff --git a/llvm/test/CodeGen/NVPTX/pow2_mask_cmp.ll b/llvm/test/CodeGen/NVPTX/pow2_mask_cmp.ll new file mode 100644 --- /dev/null +++ b/llvm/test/CodeGen/NVPTX/pow2_mask_cmp.ll @@ -0,0 +1,13 @@ +; RUN: llc -march=nvptx -verify-machineinstrs < %s | FileCheck %s + +; Tests the following pattern: +; (X & 8) != 0 --> (X & 8) >> 3 + +; CHECK-LABEL: @pow2_mask_cmp +; CHECK: bfe.u32 {{%r[0-9]+}}, {{%r[0-9]+}}, 3, 1 +define i32 @pow2_mask_cmp(i32 %x) { + %a = and i32 %x, 8 + %cmp = icmp ne i32 %a, 0 + %r = zext i1 %cmp to i32 + ret i32 %r +}