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llvm-mirror/test/CodeGen/SystemZ/memset-02.ll
Daniel Neilson f59acc15ad Remove alignment argument from memcpy/memmove/memset in favour of alignment attributes (Step 1) 
Summary:
 This is a resurrection of work first proposed and discussed in Aug 2015:
   http://lists.llvm.org/pipermail/llvm-dev/2015-August/089384.html
and initially landed (but then backed out) in Nov 2015:
   http://lists.llvm.org/pipermail/llvm-commits/Week-of-Mon-20151109/312083.html

 The @llvm.memcpy/memmove/memset intrinsics currently have an explicit argument
which is required to be a constant integer. It represents the alignment of the
dest (and source), and so must be the minimum of the actual alignment of the
two.

 This change is the first in a series that allows source and dest to each
have their own alignments by using the alignment attribute on their arguments.

 In this change we:
1) Remove the alignment argument.
2) Add alignment attributes to the source & dest arguments. We, temporarily,
   require that the alignments for source & dest be equal.

 For example, code which used to read:
  call void @llvm.memcpy.p0i8.p0i8.i32(i8* %dest, i8* %src, i32 100, i32 4, i1 false)
will now read
  call void @llvm.memcpy.p0i8.p0i8.i32(i8* align 4 %dest, i8* align 4 %src, i32 100, i1 false)

 Downstream users may have to update their lit tests that check for
@llvm.memcpy/memmove/memset call/declaration patterns. The following extended sed script
may help with updating the majority of your tests, but it does not catch all possible
patterns so some manual checking and updating will be required.

s~declare void @llvm\.mem(set|cpy|move)\.p([^(]*)\((.*), i32, i1\)~declare void @llvm.mem\1.p\2(\3, i1)~g
s~call void @llvm\.memset\.p([^(]*)i8\(i8([^*]*)\* (.*), i8 (.*), i8 (.*), i32 [01], i1 ([^)]*)\)~call void @llvm.memset.p\1i8(i8\2* \3, i8 \4, i8 \5, i1 \6)~g
s~call void @llvm\.memset\.p([^(]*)i16\(i8([^*]*)\* (.*), i8 (.*), i16 (.*), i32 [01], i1 ([^)]*)\)~call void @llvm.memset.p\1i16(i8\2* \3, i8 \4, i16 \5, i1 \6)~g
s~call void @llvm\.memset\.p([^(]*)i32\(i8([^*]*)\* (.*), i8 (.*), i32 (.*), i32 [01], i1 ([^)]*)\)~call void @llvm.memset.p\1i32(i8\2* \3, i8 \4, i32 \5, i1 \6)~g
s~call void @llvm\.memset\.p([^(]*)i64\(i8([^*]*)\* (.*), i8 (.*), i64 (.*), i32 [01], i1 ([^)]*)\)~call void @llvm.memset.p\1i64(i8\2* \3, i8 \4, i64 \5, i1 \6)~g
s~call void @llvm\.memset\.p([^(]*)i128\(i8([^*]*)\* (.*), i8 (.*), i128 (.*), i32 [01], i1 ([^)]*)\)~call void @llvm.memset.p\1i128(i8\2* \3, i8 \4, i128 \5, i1 \6)~g
s~call void @llvm\.memset\.p([^(]*)i8\(i8([^*]*)\* (.*), i8 (.*), i8 (.*), i32 ([0-9]*), i1 ([^)]*)\)~call void @llvm.memset.p\1i8(i8\2* align \6 \3, i8 \4, i8 \5, i1 \7)~g
s~call void @llvm\.memset\.p([^(]*)i16\(i8([^*]*)\* (.*), i8 (.*), i16 (.*), i32 ([0-9]*), i1 ([^)]*)\)~call void @llvm.memset.p\1i16(i8\2* align \6 \3, i8 \4, i16 \5, i1 \7)~g
s~call void @llvm\.memset\.p([^(]*)i32\(i8([^*]*)\* (.*), i8 (.*), i32 (.*), i32 ([0-9]*), i1 ([^)]*)\)~call void @llvm.memset.p\1i32(i8\2* align \6 \3, i8 \4, i32 \5, i1 \7)~g
s~call void @llvm\.memset\.p([^(]*)i64\(i8([^*]*)\* (.*), i8 (.*), i64 (.*), i32 ([0-9]*), i1 ([^)]*)\)~call void @llvm.memset.p\1i64(i8\2* align \6 \3, i8 \4, i64 \5, i1 \7)~g
s~call void @llvm\.memset\.p([^(]*)i128\(i8([^*]*)\* (.*), i8 (.*), i128 (.*), i32 ([0-9]*), i1 ([^)]*)\)~call void @llvm.memset.p\1i128(i8\2* align \6 \3, i8 \4, i128 \5, i1 \7)~g
s~call void @llvm\.mem(cpy|move)\.p([^(]*)i8\(i8([^*]*)\* (.*), i8([^*]*)\* (.*), i8 (.*), i32 [01], i1 ([^)]*)\)~call void @llvm.mem\1.p\2i8(i8\3* \4, i8\5* \6, i8 \7, i1 \8)~g
s~call void @llvm\.mem(cpy|move)\.p([^(]*)i16\(i8([^*]*)\* (.*), i8([^*]*)\* (.*), i16 (.*), i32 [01], i1 ([^)]*)\)~call void @llvm.mem\1.p\2i16(i8\3* \4, i8\5* \6, i16 \7, i1 \8)~g
s~call void @llvm\.mem(cpy|move)\.p([^(]*)i32\(i8([^*]*)\* (.*), i8([^*]*)\* (.*), i32 (.*), i32 [01], i1 ([^)]*)\)~call void @llvm.mem\1.p\2i32(i8\3* \4, i8\5* \6, i32 \7, i1 \8)~g
s~call void @llvm\.mem(cpy|move)\.p([^(]*)i64\(i8([^*]*)\* (.*), i8([^*]*)\* (.*), i64 (.*), i32 [01], i1 ([^)]*)\)~call void @llvm.mem\1.p\2i64(i8\3* \4, i8\5* \6, i64 \7, i1 \8)~g
s~call void @llvm\.mem(cpy|move)\.p([^(]*)i128\(i8([^*]*)\* (.*), i8([^*]*)\* (.*), i128 (.*), i32 [01], i1 ([^)]*)\)~call void @llvm.mem\1.p\2i128(i8\3* \4, i8\5* \6, i128 \7, i1 \8)~g
s~call void @llvm\.mem(cpy|move)\.p([^(]*)i8\(i8([^*]*)\* (.*), i8([^*]*)\* (.*), i8 (.*), i32 ([0-9]*), i1 ([^)]*)\)~call void @llvm.mem\1.p\2i8(i8\3* align \8 \4, i8\5* align \8 \6, i8 \7, i1 \9)~g
s~call void @llvm\.mem(cpy|move)\.p([^(]*)i16\(i8([^*]*)\* (.*), i8([^*]*)\* (.*), i16 (.*), i32 ([0-9]*), i1 ([^)]*)\)~call void @llvm.mem\1.p\2i16(i8\3* align \8 \4, i8\5* align \8 \6, i16 \7, i1 \9)~g
s~call void @llvm\.mem(cpy|move)\.p([^(]*)i32\(i8([^*]*)\* (.*), i8([^*]*)\* (.*), i32 (.*), i32 ([0-9]*), i1 ([^)]*)\)~call void @llvm.mem\1.p\2i32(i8\3* align \8 \4, i8\5* align \8 \6, i32 \7, i1 \9)~g
s~call void @llvm\.mem(cpy|move)\.p([^(]*)i64\(i8([^*]*)\* (.*), i8([^*]*)\* (.*), i64 (.*), i32 ([0-9]*), i1 ([^)]*)\)~call void @llvm.mem\1.p\2i64(i8\3* align \8 \4, i8\5* align \8 \6, i64 \7, i1 \9)~g
s~call void @llvm\.mem(cpy|move)\.p([^(]*)i128\(i8([^*]*)\* (.*), i8([^*]*)\* (.*), i128 (.*), i32 ([0-9]*), i1 ([^)]*)\)~call void @llvm.mem\1.p\2i128(i8\3* align \8 \4, i8\5* align \8 \6, i128 \7, i1 \9)~g

 The remaining changes in the series will:
Step 2) Expand the IRBuilder API to allow creation of memcpy/memmove with differing
   source and dest alignments.
Step 3) Update Clang to use the new IRBuilder API.
Step 4) Update Polly to use the new IRBuilder API.
Step 5) Update LLVM passes that create memcpy/memmove calls to use the new IRBuilder API,
        and those that use use MemIntrinsicInst::[get|set]Alignment() to use
        getDestAlignment() and getSourceAlignment() instead.
Step 6) Remove the single-alignment IRBuilder API for memcpy/memmove, and the
        MemIntrinsicInst::[get|set]Alignment() methods.

Reviewers: pete, hfinkel, lhames, reames, bollu

Reviewed By: reames

Subscribers: niosHD, reames, jholewinski, qcolombet, jfb, sanjoy, arsenm, dschuff, dylanmckay, mehdi_amini, sdardis, nemanjai, david2050, nhaehnle, javed.absar, sbc100, jgravelle-google, eraman, aheejin, kbarton, JDevlieghere, asb, rbar, johnrusso, simoncook, jordy.potman.lists, apazos, sabuasal, llvm-commits

Differential Revision: https://reviews.llvm.org/D41675

llvm-svn: 322965
2018-01-19 17:13:12 +00:00

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3.8 KiB
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; Test memset in cases where the set value is a constant other than 0 and -1.
;
; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
declare void @llvm.memset.p0i8.i32(i8 *nocapture, i8, i32, i1) nounwind
declare void @llvm.memset.p0i8.i64(i8 *nocapture, i8, i64, i1) nounwind
; No bytes, i32 version.
define void @f1(i8* %dest) {
; CHECK-LABEL: f1:
; CHECK-NOT: %r2
; CHECK: br %r14
call void @llvm.memset.p0i8.i32(i8* %dest, i8 128, i32 0, i1 false)
ret void
}
; No bytes, i64 version.
define void @f2(i8* %dest) {
; CHECK-LABEL: f2:
; CHECK-NOT: %r2
; CHECK: br %r14
call void @llvm.memset.p0i8.i64(i8* %dest, i8 128, i64 0, i1 false)
ret void
}
; 1 byte, i32 version.
define void @f3(i8* %dest) {
; CHECK-LABEL: f3:
; CHECK: mvi 0(%r2), 128
; CHECK: br %r14
call void @llvm.memset.p0i8.i32(i8* %dest, i8 128, i32 1, i1 false)
ret void
}
; 1 byte, i64 version.
define void @f4(i8* %dest) {
; CHECK-LABEL: f4:
; CHECK: mvi 0(%r2), 128
; CHECK: br %r14
call void @llvm.memset.p0i8.i64(i8* %dest, i8 128, i64 1, i1 false)
ret void
}
; 2 bytes, i32 version.
define void @f5(i8* %dest) {
; CHECK-LABEL: f5:
; CHECK: mvhhi 0(%r2), -32640
; CHECK: br %r14
call void @llvm.memset.p0i8.i32(i8* %dest, i8 128, i32 2, i1 false)
ret void
}
; 2 bytes, i64 version.
define void @f6(i8* %dest) {
; CHECK-LABEL: f6:
; CHECK: mvhhi 0(%r2), -32640
; CHECK: br %r14
call void @llvm.memset.p0i8.i64(i8* %dest, i8 128, i64 2, i1 false)
ret void
}
; 3 bytes, i32 version.
define void @f7(i8* %dest) {
; CHECK-LABEL: f7:
; CHECK-DAG: mvhhi 0(%r2), -32640
; CHECK-DAG: mvi 2(%r2), 128
; CHECK: br %r14
call void @llvm.memset.p0i8.i32(i8* %dest, i8 128, i32 3, i1 false)
ret void
}
; 3 bytes, i64 version.
define void @f8(i8* %dest) {
; CHECK-LABEL: f8:
; CHECK-DAG: mvhhi 0(%r2), -32640
; CHECK-DAG: mvi 2(%r2), 128
; CHECK: br %r14
call void @llvm.memset.p0i8.i64(i8* %dest, i8 128, i64 3, i1 false)
ret void
}
; 4 bytes, i32 version.
define void @f9(i8* %dest) {
; CHECK-LABEL: f9:
; CHECK: iilf [[REG:%r[0-5]]], 2155905152
; CHECK: st [[REG]], 0(%r2)
; CHECK: br %r14
call void @llvm.memset.p0i8.i32(i8* %dest, i8 128, i32 4, i1 false)
ret void
}
; 4 bytes, i64 version.
define void @f10(i8* %dest) {
; CHECK-LABEL: f10:
; CHECK: iilf [[REG:%r[0-5]]], 2155905152
; CHECK: st [[REG]], 0(%r2)
; CHECK: br %r14
call void @llvm.memset.p0i8.i64(i8* %dest, i8 128, i64 4, i1 false)
ret void
}
; 5 bytes, i32 version.
define void @f11(i8* %dest) {
; CHECK-LABEL: f11:
; CHECK: mvi 0(%r2), 128
; CHECK: mvc 1(4,%r2), 0(%r2)
; CHECK: br %r14
call void @llvm.memset.p0i8.i32(i8* %dest, i8 128, i32 5, i1 false)
ret void
}
; 5 bytes, i64 version.
define void @f12(i8* %dest) {
; CHECK-LABEL: f12:
; CHECK: mvi 0(%r2), 128
; CHECK: mvc 1(4,%r2), 0(%r2)
; CHECK: br %r14
call void @llvm.memset.p0i8.i64(i8* %dest, i8 128, i64 5, i1 false)
ret void
}
; 257 bytes, i32 version.
define void @f13(i8* %dest) {
; CHECK-LABEL: f13:
; CHECK: mvi 0(%r2), 128
; CHECK: mvc 1(256,%r2), 0(%r2)
; CHECK: br %r14
call void @llvm.memset.p0i8.i32(i8* %dest, i8 128, i32 257, i1 false)
ret void
}
; 257 bytes, i64 version.
define void @f14(i8* %dest) {
; CHECK-LABEL: f14:
; CHECK: mvi 0(%r2), 128
; CHECK: mvc 1(256,%r2), 0(%r2)
; CHECK: br %r14
call void @llvm.memset.p0i8.i64(i8* %dest, i8 128, i64 257, i1 false)
ret void
}
; 258 bytes, i32 version. We need two MVCs.
define void @f15(i8* %dest) {
; CHECK-LABEL: f15:
; CHECK: mvi 0(%r2), 128
; CHECK: mvc 1(256,%r2), 0(%r2)
; CHECK: mvc 257(1,%r2), 256(%r2)
; CHECK: br %r14
call void @llvm.memset.p0i8.i32(i8* %dest, i8 128, i32 258, i1 false)
ret void
}
; 258 bytes, i64 version.
define void @f16(i8* %dest) {
; CHECK-LABEL: f16:
; CHECK: mvi 0(%r2), 128
; CHECK: mvc 1(256,%r2), 0(%r2)
; CHECK: mvc 257(1,%r2), 256(%r2)
; CHECK: br %r14
call void @llvm.memset.p0i8.i64(i8* %dest, i8 128, i64 258, i1 false)
ret void
}
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