xref: /aosp_15_r20/external/llvm/test/CodeGen/X86/shl-anyext.ll (revision 9880d6810fe72a1726cb53787c6711e909410d58)

; RUN: llc -march=x86-64 < %s | FileCheck %s

; Codegen should be able to use a 32-bit shift instead of a 64-bit shift.
; CHECK: shll $16

define fastcc void @test(i32 %level, i64 %a, i64 %b, i64 %c, i64 %d, i32* %p) nounwind {
if.end523:                                        ; preds = %if.end453
  %conv7981749 = zext i32 %level to i64           ; <i64> [#uses=1]
  %and799 = shl i64 %conv7981749, 16              ; <i64> [#uses=1]
  %shl800 = and i64 %and799, 16711680             ; <i64> [#uses=1]
  %or801 = or i64 %shl800, %a                     ; <i64> [#uses=1]
  %or806 = or i64 %or801, %b                      ; <i64> [#uses=1]
  %or811 = or i64 %or806, %c                      ; <i64> [#uses=1]
  %or819 = or i64 %or811, %d                      ; <i64> [#uses=1]
  %conv820 = trunc i64 %or819 to i32              ; <i32> [#uses=1]
  store i32 %conv820, i32* %p
  ret void
}

; CHECK-LABEL: foo:

declare void @bar(i64)

define fastcc void @foo(i32 %t) {
bb:
  %tmp = add i32 %t, -1                           ; <i32> [#uses=1]
  br label %bb1

bb1:                                              ; preds = %bb
  %tmp2 = zext i32 %tmp to i64                    ; <i64> [#uses=2]
  %tmp3 = add i64 %tmp2, 1                        ; <i64> [#uses=1]
  %tmp4 = xor i64 %tmp2, 536870911                ; <i64> [#uses=1]
  %tmp5 = and i64 %tmp3, %tmp4                    ; <i64> [#uses=1]
  %tmp6 = shl i64 %tmp5, 3                        ; <i64> [#uses=1]
  %tmp7 = sub i64 64, %tmp6                       ; <i64> [#uses=1]
  %tmp8 = and i64 %tmp7, 4294967288               ; <i64> [#uses=1]
  %tmp9 = lshr i64 -1, %tmp8                      ; <i64> [#uses=1]
  call void @bar(i64 %tmp9)
  ret void
}