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	Add another rdar number.	2011-01-24 17:54:01 +00:00
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Assembler	Move unnamed_addr after the function arguments on Sabre's request.	2011-01-25 19:09:56 +00:00
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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
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FrontendAda	Testcase for dragonegg commit 124128.	2011-01-24 18:04:33 +00:00
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Linker	fix PR9015, a crash linking recursive metadata.	2011-01-24 03:18:24 +00:00
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MC	PR9030: Fix disassembly of ARM "mov pc, lr" instruction.	2011-01-28 17:50:30 +00:00
Object	Revert "Object: Renable the tests now that none of the build bots complain about aliasing."	2011-01-21 06:27:04 +00:00
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Transforms	Add the select optimization recently added to instcombine to constant folding.	2011-01-29 20:35:06 +00:00
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