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fd7bc34e21
For two ROTR operations with shifts C1, C2; combined shift operand will be (C1 + C2) % bitsize. Differential revision: https://reviews.llvm.org/D12833 llvm-svn: 307179
34 lines
1.0 KiB
LLVM
34 lines
1.0 KiB
LLVM
; RUN: llc -mtriple=arm-eabi -mattr=+v6 %s -o - | FileCheck %s
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; rotr (rotr x, 4), 6 -> rotr x, 10 -> ror r0, r0, #10
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define i32 @test1(i32 %x) nounwind readnone {
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; CHECK-LABEL: test1:
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; CHECK: ror r0, r0, #10
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; CHECK: bx lr
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entry:
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%high_part.i = shl i32 %x, 28
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%low_part.i = lshr i32 %x, 4
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%result.i = or i32 %high_part.i, %low_part.i
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%high_part.i.1 = shl i32 %result.i, 26
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%low_part.i.2 = lshr i32 %result.i, 6
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%result.i.3 = or i32 %low_part.i.2, %high_part.i.1
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ret i32 %result.i.3
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}
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; the same vector test
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define <2 x i32> @test2(<2 x i32> %x) nounwind readnone {
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; CHECK-LABEL: test2:
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; CHECK: ror r0, r0, #10
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; CHECK: ror r1, r1, #10
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; CHECK: bx lr
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entry:
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%high_part.i = shl <2 x i32> %x, <i32 28, i32 28>
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%low_part.i = lshr <2 x i32> %x, <i32 4, i32 4>
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%result.i = or <2 x i32> %high_part.i, %low_part.i
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%high_part.i.1 = shl <2 x i32> %result.i, <i32 26, i32 26>
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%low_part.i.2 = lshr <2 x i32> %result.i, <i32 6, i32 6>
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%result.i.3 = or <2 x i32> %low_part.i.2, %high_part.i.1
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ret <2 x i32> %result.i.3
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}
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