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llvm-6502/test/CodeGen/X86/memset64-on-x86-32.ll

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Do not throw away alignment when generating the DAG for memset; we may need it to decide between MOVAPS and MOVUPS later. Adjust a test that was looking for wrong code. PR 3866 / 8675131. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@119605 91177308-0d34-0410-b5e6-96231b3b80d8
2010-11-18 01:35:23 +00:00
; RUN: llc < %s -mtriple=i386-apple-darwin -mcpu=nehalem | grep movups | count 5
Revert r122955. It seems using movups to lower memcpy can cause massive regression (even on Nehalem) in edge cases. I also didn't see any real performance benefit. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123015 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-07 19:35:30 +00:00
; RUN: llc < %s -mtriple=i386-apple-darwin -mcpu=core2 | grep movl | count 20
X86: Enable SSE memory intrinsics even when stack alignment is less than 16 bytes. The stack realignment code was fixed to work when there is stack realignment and a dynamic alloca is present so this shouldn't cause correctness issues anymore. Note that this also enables generation of AVX instructions for memset under the assumptions: - Unaligned loads/stores are always fast on CPUs supporting AVX - AVX is not slower than SSE We may need some tweaked heuristics if one of those assumptions turns out not to be true. Effectively reverts r58317. Part of PR2962. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167967 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-14 20:08:40 +00:00
; RUN: llc < %s -mtriple=i386-pc-mingw32 -mcpu=core2 | grep movl | count 20
Revert r122955. It seems using movups to lower memcpy can cause massive regression (even on Nehalem) in edge cases. I also didn't see any real performance benefit. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123015 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-07 19:35:30 +00:00
; RUN: llc < %s -mtriple=x86_64-apple-darwin -mcpu=core2 | grep movq | count 10
Recreate the size SDNode instead of reusing the old one in the x86 memcpy lowering code; this ensures that the size node has the desired result type. This fixes a regression from r49572 with @llvm.memcpy.i64 on x86-32. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49761 91177308-0d34-0410-b5e6-96231b3b80d8
2008-04-16 01:32:32 +00:00
Fix a number of byval / memcpy / memset related codegen issues. 1. x86-64 byval alignment should be max of 8 and alignment of type. Previously the code was not doing what the commit message was saying. 2. Do not use byte repeat move and store operations. These are slow. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55139 91177308-0d34-0410-b5e6-96231b3b80d8
2008-08-21 21:00:15 +00:00
define void @bork() nounwind {
Recreate the size SDNode instead of reusing the old one in the x86 memcpy lowering code; this ensures that the size node has the desired result type. This fixes a regression from r49572 with @llvm.memcpy.i64 on x86-32. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49761 91177308-0d34-0410-b5e6-96231b3b80d8
2008-04-16 01:32:32 +00:00
entry:
rip out a ton of intrinsic modernization logic from AutoUpgrade.cpp, which is for pre-2.9 bitcode files. We keep x86 unaligned loads, movnt, crc32, and the target indep prefetch change. As usual, updating the testsuite is a PITA. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@133337 91177308-0d34-0410-b5e6-96231b3b80d8
2011-06-18 06:05:24 +00:00
call void @llvm.memset.p0i8.i64(i8* null, i8 0, i64 80, i32 4, i1 false)
ret void
Recreate the size SDNode instead of reusing the old one in the x86 memcpy lowering code; this ensures that the size node has the desired result type. This fixes a regression from r49572 with @llvm.memcpy.i64 on x86-32. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49761 91177308-0d34-0410-b5e6-96231b3b80d8
2008-04-16 01:32:32 +00:00
}
rip out a ton of intrinsic modernization logic from AutoUpgrade.cpp, which is for pre-2.9 bitcode files. We keep x86 unaligned loads, movnt, crc32, and the target indep prefetch change. As usual, updating the testsuite is a PITA. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@133337 91177308-0d34-0410-b5e6-96231b3b80d8
2011-06-18 06:05:24 +00:00
declare void @llvm.memset.p0i8.i64(i8* nocapture, i8, i64, i32, i1) nounwind
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