mirror of
https://github.com/jeremysrand/llvm-65816.git
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166 lines
3.8 KiB
LLVM
166 lines
3.8 KiB
LLVM
; Test XORs of a constant into a byte of memory.
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;
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; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
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; Check the lowest useful constant, expressed as a signed integer.
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define void @f1(i8 *%ptr) {
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; CHECK-LABEL: f1:
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; CHECK: xi 0(%r2), 1
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; CHECK: br %r14
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%val = load i8 *%ptr
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%xor = xor i8 %val, -255
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store i8 %xor, i8 *%ptr
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ret void
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}
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; Check the highest useful constant, expressed as a signed integer.
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define void @f2(i8 *%ptr) {
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; CHECK-LABEL: f2:
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; CHECK: xi 0(%r2), 254
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; CHECK: br %r14
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%val = load i8 *%ptr
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%xor = xor i8 %val, -2
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store i8 %xor, i8 *%ptr
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ret void
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}
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; Check the lowest useful constant, expressed as an unsigned integer.
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define void @f3(i8 *%ptr) {
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; CHECK-LABEL: f3:
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; CHECK: xi 0(%r2), 1
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; CHECK: br %r14
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%val = load i8 *%ptr
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%xor = xor i8 %val, 1
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store i8 %xor, i8 *%ptr
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ret void
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}
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; Check the highest useful constant, expressed as a unsigned integer.
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define void @f4(i8 *%ptr) {
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; CHECK-LABEL: f4:
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; CHECK: xi 0(%r2), 254
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; CHECK: br %r14
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%val = load i8 *%ptr
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%xor = xor i8 %val, 254
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store i8 %xor, i8 *%ptr
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ret void
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}
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; Check the high end of the XI range.
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define void @f5(i8 *%src) {
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; CHECK-LABEL: f5:
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; CHECK: xi 4095(%r2), 127
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; CHECK: br %r14
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%ptr = getelementptr i8 *%src, i64 4095
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%val = load i8 *%ptr
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%xor = xor i8 %val, 127
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store i8 %xor, i8 *%ptr
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ret void
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}
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; Check the next byte up, which should use XIY instead of XI.
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define void @f6(i8 *%src) {
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; CHECK-LABEL: f6:
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; CHECK: xiy 4096(%r2), 127
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; CHECK: br %r14
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%ptr = getelementptr i8 *%src, i64 4096
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%val = load i8 *%ptr
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%xor = xor i8 %val, 127
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store i8 %xor, i8 *%ptr
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ret void
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}
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; Check the high end of the XIY range.
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define void @f7(i8 *%src) {
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; CHECK-LABEL: f7:
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; CHECK: xiy 524287(%r2), 127
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; CHECK: br %r14
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%ptr = getelementptr i8 *%src, i64 524287
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%val = load i8 *%ptr
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%xor = xor i8 %val, 127
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store i8 %xor, i8 *%ptr
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ret void
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}
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; Check the next byte up, which needs separate address logic.
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; Other sequences besides this one would be OK.
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define void @f8(i8 *%src) {
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; CHECK-LABEL: f8:
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; CHECK: agfi %r2, 524288
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; CHECK: xi 0(%r2), 127
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; CHECK: br %r14
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%ptr = getelementptr i8 *%src, i64 524288
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%val = load i8 *%ptr
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%xor = xor i8 %val, 127
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store i8 %xor, i8 *%ptr
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ret void
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}
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; Check the high end of the negative XIY range.
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define void @f9(i8 *%src) {
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; CHECK-LABEL: f9:
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; CHECK: xiy -1(%r2), 127
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; CHECK: br %r14
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%ptr = getelementptr i8 *%src, i64 -1
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%val = load i8 *%ptr
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%xor = xor i8 %val, 127
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store i8 %xor, i8 *%ptr
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ret void
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}
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; Check the low end of the XIY range.
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define void @f10(i8 *%src) {
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; CHECK-LABEL: f10:
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; CHECK: xiy -524288(%r2), 127
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; CHECK: br %r14
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%ptr = getelementptr i8 *%src, i64 -524288
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%val = load i8 *%ptr
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%xor = xor i8 %val, 127
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store i8 %xor, i8 *%ptr
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ret void
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}
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; Check the next byte down, which needs separate address logic.
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; Other sequences besides this one would be OK.
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define void @f11(i8 *%src) {
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; CHECK-LABEL: f11:
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; CHECK: agfi %r2, -524289
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; CHECK: xi 0(%r2), 127
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; CHECK: br %r14
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%ptr = getelementptr i8 *%src, i64 -524289
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%val = load i8 *%ptr
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%xor = xor i8 %val, 127
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store i8 %xor, i8 *%ptr
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ret void
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}
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; Check that XI does not allow an index
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define void @f12(i64 %src, i64 %index) {
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; CHECK-LABEL: f12:
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; CHECK: agr %r2, %r3
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; CHECK: xi 4095(%r2), 127
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; CHECK: br %r14
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%add1 = add i64 %src, %index
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%add2 = add i64 %add1, 4095
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%ptr = inttoptr i64 %add2 to i8 *
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%val = load i8 *%ptr
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%xor = xor i8 %val, 127
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store i8 %xor, i8 *%ptr
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ret void
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}
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; Check that XIY does not allow an index
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define void @f13(i64 %src, i64 %index) {
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; CHECK-LABEL: f13:
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; CHECK: agr %r2, %r3
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; CHECK: xiy 4096(%r2), 127
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; CHECK: br %r14
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%add1 = add i64 %src, %index
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%add2 = add i64 %add1, 4096
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%ptr = inttoptr i64 %add2 to i8 *
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%val = load i8 *%ptr
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%xor = xor i8 %val, 127
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store i8 %xor, i8 *%ptr
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ret void
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}
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