File: fast-isel-shift-materialize.ll

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llvm-toolchain-17 1%3A17.0.6-22
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; RUN: llc %s -o - -verify-machineinstrs -fast-isel=true | FileCheck %s

target datalayout = "e-m:o-p:32:32-f64:32:64-v64:32:64-v128:32:128-a:0:32-n32-S32"
target triple = "thumbv7-apple-ios8.0.0"

; When materializing the '2' for the shifts below, the second shift kills the vreg
; we materialize in to.  However, the first shift was also killing that vreg.
; This fails the machine verifier because the second use then thinks its reading an
; undefined register.

; CHECK: lsr.w
; CHECK: lsr.w

declare void @foo(i32, i32)

; Function Attrs: minsize
define i32 @test(i32 %tmp3, i32 %tmp9) #0 {
bb:
  %tmp4 = lshr i32 %tmp3, 2
  %tmp10 = lshr i32 %tmp9, 2
  call void @foo(i32 %tmp10, i32 %tmp4)
  ret i32 undef
}

attributes #0 = { minsize }