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6a343cafa0
Emit clrrdi (extended mnemonic for rldicr) for AND-ing with masks that clear bits from the right hand size. Committing on behalf of Hiroshi Inoue. Differential Revision: https://reviews.llvm.org/D29388 llvm-svn: 296143
28 lines
705 B
LLVM
28 lines
705 B
LLVM
; RUN: llc -verify-machineinstrs < %s -mtriple=powerpc64-unknown-linux-gnu -mcpu=a2 | FileCheck %s
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target datalayout = "E-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-f128:128:128-v128:128:128-n32:64"
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target triple = "powerpc64-unknown-linux-gnu"
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define i64 @foo(i64 %x) #0 {
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entry:
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; CHECK-LABEL: @foo
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%a = lshr i64 %x, 35
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%b = and i64 %a, 65535
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; CHECK: rldicl 3, 3, 29, 48
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ret i64 %b
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; CHECK: blr
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}
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; for AND with an immediate like (x & ~0xFFFF)
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; we should use rldicl instruction
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define i64 @bar(i64 %x) #0 {
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entry:
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; CHECK-LABEL: @bar
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%a = and i64 %x, 18446744073709486080
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; CHECK: rldicr 3, 3, 0, 47
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ret i64 %a
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; CHECK: blr
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}
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attributes #0 = { nounwind }
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