Benjamin Kramer 9b108a338d Teach DAGCombine to fold fold (sra (trunc (sr x, c1)), c2) -> (trunc (sra x, c1+c2) when c1 equals the amount of bits that are truncated off. ... This happens all the time when a smul is promoted to a larger type. On x86-64 we now compile "int test(int x) { return x/10; }" into movslq %edi, %rax imulq $1717986919, %rax, %rax movq %rax, %rcx shrq $63, %rcx sarq $34, %rax <- used to be "shrq $32, %rax; sarl $2, %eax" addl %ecx, %eax This fires 96 times in gcc.c on x86-64. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124559 91177308-0d34-0410-b5e6-96231b3b80d8		2011-01-30 16:38:43 +00:00
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Analysis	Fix comment.	2011-01-29 19:55:23 +00:00
Archive
AsmParser	Move unnamed_addr after the function arguments on Sabre's request.	2011-01-25 19:09:56 +00:00
Bitcode
CodeGen	Teach DAGCombine to fold fold (sra (trunc (sr x, c1)), c2) -> (trunc (sra x, c1+c2) when c1 equals the amount of bits that are truncated off.	2011-01-30 16:38:43 +00:00
CompilerDriver
ExecutionEngine	Fix libffi usage when it is on a custom path.	2011-01-28 16:49:05 +00:00
Linker
MC	Error on .code16 instead of producing wrong (32bit) code.	2011-01-28 19:29:48 +00:00
Object
Support	Support/CommandLine: Fix LookupNearestOption to also search extra option names.	2011-01-24 17:27:17 +00:00
Target	Teach DAGCombine to fold fold (sra (trunc (sr x, c1)), c2) -> (trunc (sra x, c1+c2) when c1 equals the amount of bits that are truncated off.	2011-01-30 16:38:43 +00:00
Transforms	Unbreak the MSVC build.	2011-01-29 20:06:16 +00:00
VMCore	Fix 'fcmp one' constant folding. Noticed by inspection.	2011-01-30 01:49:58 +00:00
Makefile