File: undef-sext.ll

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llvm-toolchain-3.9 1%3A3.9.1-9
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; RUN: llc < %s -mtriple=armv7-apple-darwin -mcpu=cortex-a8 | FileCheck %s

; No need to sign-extend undef.

define i32 @t(i32* %a) nounwind {
entry:
; CHECK-LABEL: t:
; CHECK: ldr r0, [r0]
; CHECK: bx lr
  %0 = sext i16 undef to i32
  %1 = getelementptr inbounds i32, i32* %a, i32 %0
  %2 = load i32, i32* %1, align 4
  ret i32 %2
}