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llvm-project/llvm/test/CodeGen/XCore/memcpy.ll

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[XCore] Target optimized library function __memcpy_4() Summary: If the src, dst and size of a memcpy are known to be 4 byte aligned we can call __memcpy_4() instead of memcpy(). Reviewers: robertlytton Reviewed By: robertlytton CC: llvm-commits Differential Revision: http://llvm-reviews.chandlerc.com/D2871 llvm-svn: 202395
2014-02-27 21:39:07 +08:00
; RUN: llc < %s -march=xcore | FileCheck %s
; Optimize memcpy to __memcpy_4 if src, dst and size are all 4 byte aligned.
define void @f1(i8* %dst, i8* %src, i32 %n) nounwind {
; CHECK-LABEL: f1:
; CHECK: bl __memcpy_4
entry:
%0 = shl i32 %n, 2
Revert "Change memcpy/memset/memmove to have dest and source alignments." This reverts commit r253511. This likely broke the bots in http://lab.llvm.org:8011/builders/clang-ppc64-elf-linux2/builds/20202 http://bb.pgr.jp/builders/clang-3stage-i686-linux/builds/3787 llvm-svn: 253543
2015-11-19 13:56:52 +08:00
call void @llvm.memcpy.p0i8.p0i8.i32(i8* %dst, i8* %src, i32 %0, i32 4, i1 false)
[XCore] Target optimized library function __memcpy_4() Summary: If the src, dst and size of a memcpy are known to be 4 byte aligned we can call __memcpy_4() instead of memcpy(). Reviewers: robertlytton Reviewed By: robertlytton CC: llvm-commits Differential Revision: http://llvm-reviews.chandlerc.com/D2871 llvm-svn: 202395
2014-02-27 21:39:07 +08:00
ret void
}
; Can't optimize - size is not a multiple of 4.
define void @f2(i8* %dst, i8* %src, i32 %n) nounwind {
; CHECK-LABEL: f2:
; CHECK: bl memcpy
entry:
Revert "Change memcpy/memset/memmove to have dest and source alignments." This reverts commit r253511. This likely broke the bots in http://lab.llvm.org:8011/builders/clang-ppc64-elf-linux2/builds/20202 http://bb.pgr.jp/builders/clang-3stage-i686-linux/builds/3787 llvm-svn: 253543
2015-11-19 13:56:52 +08:00
call void @llvm.memcpy.p0i8.p0i8.i32(i8* %dst, i8* %src, i32 %n, i32 4, i1 false)
[XCore] Target optimized library function __memcpy_4() Summary: If the src, dst and size of a memcpy are known to be 4 byte aligned we can call __memcpy_4() instead of memcpy(). Reviewers: robertlytton Reviewed By: robertlytton CC: llvm-commits Differential Revision: http://llvm-reviews.chandlerc.com/D2871 llvm-svn: 202395
2014-02-27 21:39:07 +08:00
ret void
}
; Can't optimize - alignment is not a multiple of 4.
define void @f3(i8* %dst, i8* %src, i32 %n) nounwind {
; CHECK-LABEL: f3:
; CHECK: bl memcpy
entry:
%0 = shl i32 %n, 2
Revert "Change memcpy/memset/memmove to have dest and source alignments." This reverts commit r253511. This likely broke the bots in http://lab.llvm.org:8011/builders/clang-ppc64-elf-linux2/builds/20202 http://bb.pgr.jp/builders/clang-3stage-i686-linux/builds/3787 llvm-svn: 253543
2015-11-19 13:56:52 +08:00
call void @llvm.memcpy.p0i8.p0i8.i32(i8* %dst, i8* %src, i32 %0, i32 2, i1 false)
[XCore] Target optimized library function __memcpy_4() Summary: If the src, dst and size of a memcpy are known to be 4 byte aligned we can call __memcpy_4() instead of memcpy(). Reviewers: robertlytton Reviewed By: robertlytton CC: llvm-commits Differential Revision: http://llvm-reviews.chandlerc.com/D2871 llvm-svn: 202395
2014-02-27 21:39:07 +08:00
ret void
}
Revert "Change memcpy/memset/memmove to have dest and source alignments." This reverts commit r253511. This likely broke the bots in http://lab.llvm.org:8011/builders/clang-ppc64-elf-linux2/builds/20202 http://bb.pgr.jp/builders/clang-3stage-i686-linux/builds/3787 llvm-svn: 253543
2015-11-19 13:56:52 +08:00
declare void @llvm.memcpy.p0i8.p0i8.i32(i8* nocapture, i8* nocapture, i32, i32, i1) nounwind