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https://github.com/c64scene-ar/llvm-6502.git
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b3cabb44c3
RISBG can handle some ANDs for which no AND IMMEDIATE exists. It also acts as a three-operand AND for some cases where an AND IMMEDIATE could be used instead. It might be worth adding a pass to replace RISBG with AND IMMEDIATE in cases where the register operands end up being the same and where AND IMMEDIATE is smaller. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186072 91177308-0d34-0410-b5e6-96231b3b80d8
175 lines
3.5 KiB
LLVM
175 lines
3.5 KiB
LLVM
; Test 64-bit ANDs in which the second operand is constant.
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;
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; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
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; Use RISBG for a single bit.
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define i64 @f1(i64 %a) {
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; CHECK: f1:
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; CHECK: risbg %r2, %r2, 63, 191, 0
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; CHECK: br %r14
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%and = and i64 %a, 1
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ret i64 %and
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}
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; Likewise 0xfffe.
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define i64 @f2(i64 %a) {
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; CHECK: f2:
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; CHECK: risbg %r2, %r2, 48, 190, 0
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; CHECK: br %r14
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%and = and i64 %a, 65534
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ret i64 %and
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}
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; ...but 0xffff is a 16-bit zero extension.
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define i64 @f3(i64 %a) {
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; CHECK: f3:
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; CHECK: llghr %r2, %r2
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; CHECK: br %r14
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%and = and i64 %a, 65535
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ret i64 %and
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}
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; Check the next value up, which can again use RISBG.
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define i64 @f4(i64 %a) {
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; CHECK: f4:
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; CHECK: risbg %r2, %r2, 47, 175, 0
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; CHECK: br %r14
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%and = and i64 %a, 65536
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ret i64 %and
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}
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; Check 0xfffffffe, which can also use RISBG.
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define i64 @f5(i64 %a) {
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; CHECK: f5:
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; CHECK: risbg %r2, %r2, 32, 190, 0
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; CHECK: br %r14
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%and = and i64 %a, 4294967294
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ret i64 %and
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}
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; Check the next value up, which is a 32-bit zero extension.
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define i64 @f6(i64 %a) {
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; CHECK: f6:
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; CHECK: llgfr %r2, %r2
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; CHECK: br %r14
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%and = and i64 %a, 4294967295
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ret i64 %and
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}
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; Check the lowest useful NIHF value (0x00000002_ffffffff).
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define i64 @f7(i64 %a) {
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; CHECK: f7:
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; CHECK: nihf %r2, 2
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; CHECK: br %r14
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%and = and i64 %a, 12884901887
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ret i64 %and
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}
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; Check the lowest useful NIHH value (0x0002ffff_ffffffff).
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define i64 @f8(i64 %a) {
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; CHECK: f8:
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; CHECK: nihh %r2, 2
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; CHECK: br %r14
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%and = and i64 %a, 844424930131967
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ret i64 %and
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}
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; Check the highest useful NIHH value (0xfffaffff_ffffffff).
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define i64 @f9(i64 %a) {
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; CHECK: f9:
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; CHECK: nihh %r2, 65530
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; CHECK: br %r14
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%and = and i64 %a, -1407374883553281
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ret i64 %and
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}
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; Check the highest useful NIHF value (0xfffefffe_ffffffff).
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define i64 @f10(i64 %a) {
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; CHECK: f10:
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; CHECK: nihf %r2, 4294901758
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; CHECK: br %r14
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%and = and i64 %a, -281479271677953
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ret i64 %and
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}
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; Check the lowest useful NIHL value (0xffff0002_ffffffff).
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define i64 @f11(i64 %a) {
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; CHECK: f11:
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; CHECK: nihl %r2, 2
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; CHECK: br %r14
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%and = and i64 %a, -281462091808769
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ret i64 %and
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}
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; Check the highest useful NIHL value (0xfffffffa_ffffffff).
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define i64 @f12(i64 %a) {
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; CHECK: f12:
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; CHECK: nihl %r2, 65530
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; CHECK: br %r14
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%and = and i64 %a, -21474836481
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ret i64 %and
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}
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; Check the lowest useful NILF range (0xffffffff_00000002).
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define i64 @f13(i64 %a) {
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; CHECK: f13:
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; CHECK: nilf %r2, 2
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; CHECK: br %r14
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%and = and i64 %a, -4294967294
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ret i64 %and
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}
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; Check the low end of the NILH range (0xffffffff_0002ffff).
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define i64 @f14(i64 %a) {
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; CHECK: f14:
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; CHECK: nilh %r2, 2
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; CHECK: br %r14
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%and = and i64 %a, -4294770689
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ret i64 %and
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}
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; Check the next value up, which must use NILF.
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define i64 @f15(i64 %a) {
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; CHECK: f15:
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; CHECK: nilf %r2, 196608
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; CHECK: br %r14
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%and = and i64 %a, -4294770688
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ret i64 %and
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}
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; Check the highest useful NILH value (0xffffffff_fffaffff).
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define i64 @f16(i64 %a) {
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; CHECK: f16:
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; CHECK: nilh %r2, 65530
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; CHECK: br %r14
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%and = and i64 %a, -327681
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ret i64 %and
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}
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; Check the maximum useful NILF value (0xffffffff_fffefffe).
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define i64 @f17(i64 %a) {
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; CHECK: f17:
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; CHECK: nilf %r2, 4294901758
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; CHECK: br %r14
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%and = and i64 %a, -65538
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ret i64 %and
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}
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; Check the lowest useful NILL value (0xffffffff_ffff0002).
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define i64 @f18(i64 %a) {
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; CHECK: f18:
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; CHECK: nill %r2, 2
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; CHECK: br %r14
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%and = and i64 %a, -65534
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ret i64 %and
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}
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; Check the highest useful NILL value.
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define i64 @f19(i64 %a) {
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; CHECK: f19:
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; CHECK: nill %r2, 65530
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; CHECK: br %r14
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%and = and i64 %a, -6
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ret i64 %and
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}
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