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llvm-project/llvm/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. llvm-svn: 119605
2010-11-18 09:35:23 +08:00
; 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. llvm-svn: 123015
2011-01-08 03:35:30 +08:00
; RUN: llc < %s -mtriple=i386-apple-darwin -mcpu=core2 | grep movl | count 20
; 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. llvm-svn: 49761
2008-04-16 09:32:32 +08:00
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. llvm-svn: 55139
2008-08-22 05:00:15 +08:00
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. llvm-svn: 49761
2008-04-16 09:32:32 +08:00
entry:
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. llvm-svn: 55139
2008-08-22 05:00:15 +08:00
call void @llvm.memset.i64( i8* null, i8 0, i64 80, i32 4 )
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. llvm-svn: 49761
2008-04-16 09:32:32 +08:00
}
declare void @llvm.memset.i64(i8*, i8, i64, i32) nounwind