7 Commits

Author	SHA1	Message	Date
Chris Lattner	b90ed2233c	manually upgrade a bunch of tests to modern syntax, and remove some that ... are either unreduced or only test old syntax. llvm-svn: 133228	2011-06-17 03:14:27 +00:00
Benjamin Kramer	2fd48f2730	Implement mulo x, 2 -> addo x, x in DAGCombiner. ... llvm-svn: 131800	2011-05-21 18:31:55 +00:00
Bill Wendling	410ec4aad1	As Dan pointed out, movzbl, movsbl, and friends are nicer than their alias ... (movzx/movsx) because they give more information. Revert that part of the patch. llvm-svn: 129498	2011-04-14 01:46:37 +00:00
Bill Wendling	7e07d6fb69	Have the X86 back-end emit the alias instead of what's being aliased. In most ... cases, it's much nicer and more informative reading the alias. llvm-svn: 129497	2011-04-14 01:11:51 +00:00
Chris Lattner	364bb0a081	it turns out that when ".with.overflow" intrinsics were added to the X86 ... backend that they were all implemented except umul. This one fell back to the default implementation that did a hi/lo multiply and compared the top. Fix this to check the overflow flag that the 'mul' instruction sets, so we can avoid an explicit test. Now we compile: void *func(long count) { return new int[count]; } into: __Z4funcl: ## @_Z4funcl movl $4, %ecx ## encoding: [0xb9,0x04,0x00,0x00,0x00] movq %rdi, %rax ## encoding: [0x48,0x89,0xf8] mulq %rcx ## encoding: [0x48,0xf7,0xe1] seto %cl ## encoding: [0x0f,0x90,0xc1] testb %cl, %cl ## encoding: [0x84,0xc9] movq $-1, %rdi ## encoding: [0x48,0xc7,0xc7,0xff,0xff,0xff,0xff] cmoveq %rax, %rdi ## encoding: [0x48,0x0f,0x44,0xf8] jmp __Znam ## TAILCALL instead of: __Z4funcl: ## @_Z4funcl movl $4, %ecx ## encoding: [0xb9,0x04,0x00,0x00,0x00] movq %rdi, %rax ## encoding: [0x48,0x89,0xf8] mulq %rcx ## encoding: [0x48,0xf7,0xe1] testq %rdx, %rdx ## encoding: [0x48,0x85,0xd2] movq $-1, %rdi ## encoding: [0x48,0xc7,0xc7,0xff,0xff,0xff,0xff] cmoveq %rax, %rdi ## encoding: [0x48,0x0f,0x44,0xf8] jmp __Znam ## TAILCALL Other than the silly seto+test, this is using the o bit directly, so it's going in the right direction. llvm-svn: 120935	2010-12-05 07:30:36 +00:00
Dan Gohman	40503396da	Eliminate more uses of llvm-as and llvm-dis. ... llvm-svn: 81290	2009-09-08 23:54:48 +00:00
Eli Friedman	abfad5d61e	Add some generic expansion logic for SMULO and UMULO. Fixes UMULO ... support for x86, and UMULO/SMULO for many architectures, including PPC (PR4201), ARM, and Cell. The resulting expansion isn't perfect, but it's not bad. llvm-svn: 73477	2009-06-16 06:58:29 +00:00