mirror of
https://github.com/c64scene-ar/llvm-6502.git
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9cad6c8a24
r225135 added the ability to materialize i64 constants using rotations in order to reduce the instruction count. Sometimes we can use a rotation only with some extra masking, so that we take advantage of the fact that generating a bunch of extra higher-order 1 bits is easy using li/lis. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@225147 91177308-0d34-0410-b5e6-96231b3b80d8
85 lines
1.6 KiB
LLVM
85 lines
1.6 KiB
LLVM
; RUN: llc -mcpu=ppc64 < %s | FileCheck %s
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target datalayout = "E-m:e-i64:64-n32:64"
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target triple = "powerpc64-unknown-linux-gnu"
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; Function Attrs: nounwind readnone
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define i64 @cn1() #0 {
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entry:
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ret i64 281474976710655
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; CHECK-LABEL: @cn1
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; CHECK: lis [[REG1:[0-9]+]], -1
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; CHECK: rldicr 3, [[REG1]], 48, 63
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; CHECK: blr
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}
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; Function Attrs: nounwind readnone
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define i64 @cnb() #0 {
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entry:
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ret i64 281474976710575
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; CHECK-LABEL: @cnb
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; CHECK: lis [[REG1:[0-9]+]], -81
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; CHECK: rldicr 3, [[REG1]], 48, 63
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; CHECK: blr
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}
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; Function Attrs: nounwind readnone
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define i64 @f2(i64 %x) #0 {
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entry:
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ret i64 -68719476736
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; CHECK-LABEL: @f2
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; CHECK: li [[REG1:[0-9]+]], -1
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; CHECK: sldi 3, [[REG1]], 36
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; CHECK: blr
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}
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; Function Attrs: nounwind readnone
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define i64 @f2a(i64 %x) #0 {
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entry:
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ret i64 -361850994688
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; CHECK-LABEL: @f2a
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; CHECK: li [[REG1:[0-9]+]], -337
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; CHECK: sldi 3, [[REG1]], 30
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; CHECK: blr
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}
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; Function Attrs: nounwind readnone
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define i64 @f2n(i64 %x) #0 {
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entry:
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ret i64 68719476735
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; CHECK-LABEL: @f2n
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; CHECK: lis [[REG1:[0-9]+]], -4096
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; CHECK: rldicr 3, [[REG1]], 36, 63
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; CHECK: blr
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}
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; Function Attrs: nounwind readnone
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define i64 @f3(i64 %x) #0 {
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entry:
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ret i64 8589934591
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; CHECK-LABEL: @f3
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; CHECK: lis [[REG1:[0-9]+]], -32768
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; CHECK: rldicr 3, [[REG1]], 33, 63
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; CHECK: blr
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}
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; Function Attrs: nounwind readnone
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define i64 @cn2n() #0 {
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entry:
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ret i64 -1407374887747585
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; CHECK-LABEL: @cn2n
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; CHECK: lis [[REG1:[0-9]+]], -5121
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; CHECK: ori [[REG2:[0-9]+]], [[REG1]], 65534
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; CHECK: rldicr 3, [[REG2]], 22, 63
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; CHECK: blr
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}
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attributes #0 = { nounwind readnone }
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