Benjamin Kramer 8c06aa1c59 Lower the i8 extension in memset to a multiply instead of a potentially long series of shifts and ors. ... We could implement a DAGCombine to turn x * 0x0101 back into logic operations on targets that doesn't support the multiply or it is slow (p4) if someone cares enough. Example code: void test(char *s, int a) { __builtin_memset(s, a, 4); } before: _test: ## @test movzbl 8(%esp), %eax movl %eax, %ecx shll $8, %ecx orl %eax, %ecx movl %ecx, %eax shll $16, %eax orl %ecx, %eax movl 4(%esp), %ecx movl %eax, 4(%ecx) movl %eax, (%ecx) ret after: _test: ## @test movzbl 8(%esp), %eax imull $16843009, %eax, %eax ## imm = 0x1010101 movl 4(%esp), %ecx movl %eax, 4(%ecx) movl %eax, (%ecx) ret git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122707 91177308-0d34-0410-b5e6-96231b3b80d8		2011-01-02 19:44:58 +00:00
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Alpha	If dbg_declare() or dbg_value() is not lowered by isel then emit DEBUG message instead of creating DBG_VALUE for undefined value in reg0.	2010-12-06 22:39:26 +00:00
ARM	Update the test	2011-01-01 20:57:26 +00:00
Blackfin
CBackend
CellSPU	Don't feed 19 bit immediates to ILA.	2010-12-17 09:36:09 +00:00
CPP
Generic	Fixes PR8823: add-with-overflow-128.ll	2010-12-23 03:15:51 +00:00
MBlaze	Lower the MBlaze target specific calling conventions for "interrupt_handler"	2010-12-15 20:27:28 +00:00
Mips	Add ROTR and ROTRV mips32 instructions. Patch by Akira Hatanaka	2010-12-09 17:32:30 +00:00
MSP430	If dbg_declare() or dbg_value() is not lowered by isel then emit DEBUG message instead of creating DBG_VALUE for undefined value in reg0.	2010-12-06 22:39:26 +00:00
PowerPC	Restore the behavior of frame lowering before my refactoring.	2010-12-18 19:53:14 +00:00
PTX	ptx: remove reg-reg addressing mode and st.const	2011-01-01 11:58:58 +00:00
SPARC	If dbg_declare() or dbg_value() is not lowered by isel then emit DEBUG message instead of creating DBG_VALUE for undefined value in reg0.	2010-12-06 22:39:26 +00:00
SystemZ	If dbg_declare() or dbg_value() is not lowered by isel then emit DEBUG message instead of creating DBG_VALUE for undefined value in reg0.	2010-12-06 22:39:26 +00:00
Thumb	Thumb1 had two patterns for the same load-from-constant-pool instruction.	2010-12-15 23:52:36 +00:00
Thumb2	Remove the rest of the *_sfp Neon instruction patterns.	2010-12-13 23:02:37 +00:00
X86	Lower the i8 extension in memset to a multiply instead of a potentially long series of shifts and ors.	2011-01-02 19:44:58 +00:00
XCore	If dbg_declare() or dbg_value() is not lowered by isel then emit DEBUG message instead of creating DBG_VALUE for undefined value in reg0.	2010-12-06 22:39:26 +00:00
thumb2-mul.ll