mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-08-21 18:29:46 +00:00
If we had a store of an integer to memory, and the integer and store size were suitable for a form of MV..., we used MV... no matter what. We could then have sequences like: lay %r2, 0(%r3,%r4) mvi 0(%r2), 4 In these cases it seems better to force the constant into a register and use a normal store: lhi %r2, 4 stc %r2, 0(%r3, %r4) since %r2 is more likely to be hoisted and is easier to rematerialize. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@189098 91177308-0d34-0410-b5e6-96231b3b80d8
103 lines
2.1 KiB
LLVM
103 lines
2.1 KiB
LLVM
; Test moves of integers to 8-byte memory locations.
|
|
;
|
|
; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
|
|
|
|
; Check moves of zero.
|
|
define void @f1(i64 *%a) {
|
|
; CHECK-LABEL: f1:
|
|
; CHECK: mvghi 0(%r2), 0
|
|
; CHECK: br %r14
|
|
store i64 0, i64 *%a
|
|
ret void
|
|
}
|
|
|
|
; Check the high end of the signed 16-bit range.
|
|
define void @f2(i64 *%a) {
|
|
; CHECK-LABEL: f2:
|
|
; CHECK: mvghi 0(%r2), 32767
|
|
; CHECK: br %r14
|
|
store i64 32767, i64 *%a
|
|
ret void
|
|
}
|
|
|
|
; Check the next value up, which can't use MVGHI.
|
|
define void @f3(i64 *%a) {
|
|
; CHECK-LABEL: f3:
|
|
; CHECK-NOT: mvghi
|
|
; CHECK: br %r14
|
|
store i64 32768, i64 *%a
|
|
ret void
|
|
}
|
|
|
|
; Check moves of -1.
|
|
define void @f4(i64 *%a) {
|
|
; CHECK-LABEL: f4:
|
|
; CHECK: mvghi 0(%r2), -1
|
|
; CHECK: br %r14
|
|
store i64 -1, i64 *%a
|
|
ret void
|
|
}
|
|
|
|
; Check the low end of the MVGHI range.
|
|
define void @f5(i64 *%a) {
|
|
; CHECK-LABEL: f5:
|
|
; CHECK: mvghi 0(%r2), -32768
|
|
; CHECK: br %r14
|
|
store i64 -32768, i64 *%a
|
|
ret void
|
|
}
|
|
|
|
; Check the next value down, which can't use MVGHI.
|
|
define void @f6(i64 *%a) {
|
|
; CHECK-LABEL: f6:
|
|
; CHECK-NOT: mvghi
|
|
; CHECK: br %r14
|
|
store i64 -32769, i64 *%a
|
|
ret void
|
|
}
|
|
|
|
; Check the high end of the MVGHI range.
|
|
define void @f7(i64 *%a) {
|
|
; CHECK-LABEL: f7:
|
|
; CHECK: mvghi 4088(%r2), 42
|
|
; CHECK: br %r14
|
|
%ptr = getelementptr i64 *%a, i64 511
|
|
store i64 42, i64 *%ptr
|
|
ret void
|
|
}
|
|
|
|
; Check the next doubleword up, which is out of range. We prefer STG
|
|
; in that case.
|
|
define void @f8(i64 *%a) {
|
|
; CHECK-LABEL: f8:
|
|
; CHECK: lghi [[TMP:%r[0-5]]], 42
|
|
; CHECK: stg [[TMP]], 4096(%r2)
|
|
; CHECK: br %r14
|
|
%ptr = getelementptr i64 *%a, i64 512
|
|
store i64 42, i64 *%ptr
|
|
ret void
|
|
}
|
|
|
|
; Check negative displacements, for which we again prefer STG.
|
|
define void @f9(i64 *%a) {
|
|
; CHECK-LABEL: f9:
|
|
; CHECK: lghi [[TMP:%r[0-5]]], 42
|
|
; CHECK: stg [[TMP]], -8(%r2)
|
|
; CHECK: br %r14
|
|
%ptr = getelementptr i64 *%a, i64 -1
|
|
store i64 42, i64 *%ptr
|
|
ret void
|
|
}
|
|
|
|
; Check that MVGHI does not allow an index.
|
|
define void @f10(i64 %src, i64 %index) {
|
|
; CHECK-LABEL: f10:
|
|
; CHECK: lghi [[TMP:%r[0-5]]], 42
|
|
; CHECK: stg [[TMP]], 0({{%r2,%r3|%r3,%r2}})
|
|
; CHECK: br %r14
|
|
%add = add i64 %src, %index
|
|
%ptr = inttoptr i64 %add to i64 *
|
|
store i64 42, i64 *%ptr
|
|
ret void
|
|
}
|