File: 2008-07-15-SignExtendInreg.ll

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llvm-toolchain-20 1%3A20.1.6-1~exp1
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; RUN: llc -verify-machineinstrs < %s | FileCheck %s
target datalayout = "E-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f128:64:128"
target triple = "powerpc-unknown-linux-gnu"

; CHECK: t
; CHECK: mr 4, 3
; CHECK: lbz 3
; CHECK: extsb 5, 3
; CHECK: sth 5
; CHECK: blr
define signext i16 @t(ptr %dct)  nounwind  {
entry:
         load i16, ptr null, align 2         ; <i16>:0 [#uses=2]
         lshr i16 %0, 11         ; <i16>:1 [#uses=0]
         trunc i16 %0 to i8              ; <i8>:2 [#uses=1]
         sext i8 %2 to i16               ; <i16>:3 [#uses=1]
         add i16 0, %3           ; <i16>:4 [#uses=1]
         sext i16 %4 to i32              ; <i32>:5 [#uses=1]
         %dcval.0.in = shl i32 %5, 0             ; <i32> [#uses=1]
         %dcval.0 = trunc i32 %dcval.0.in to i16         ; <i16>  [#uses=1]
         store i16 %dcval.0, ptr %dct, align 2
         ret i16 0
}