8eeabf674c
Consider FSHR legal if shift amount is constant Lower FSHL to FSHR if shift amount is constant Differential Revision: https://reviews.llvm.org/D155565
18 lines
479 B
LLVM
18 lines
479 B
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc < %s -mtriple=aarch64-unknown-linux-gnu | FileCheck %s
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define i32 @f(i32 %x) {
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; CHECK-LABEL: f:
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; CHECK: // %bb.0:
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; CHECK-NEXT: orr w8, w0, #0x1
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; CHECK-NEXT: extr w8, w8, w0, #27
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; CHECK-NEXT: and w0, w8, #0xffffffe1
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; CHECK-NEXT: ret
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%or1 = or i32 %x, 1
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%sh1 = shl i32 %or1, 5
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%sh2 = lshr i32 %x, 27
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%1 = and i32 %sh2, 1
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%r = or i32 %sh1, %1
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ret i32 %r
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}
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