Benjamin Kramer f50125ecaa DAGCombine add (sext i1), X into sub X, (zext i1) if sext from i1 is illegal. The latter usually compiles into smaller code. ... example code: unsigned foo(unsigned x, unsigned y) { if (x != 0) y--; return y; } before: _foo: ## @foo cmpl $1, 4(%esp) ## encoding: [0x83,0x7c,0x24,0x04,0x01] sbbl %eax, %eax ## encoding: [0x19,0xc0] notl %eax ## encoding: [0xf7,0xd0] addl 8(%esp), %eax ## encoding: [0x03,0x44,0x24,0x08] ret ## encoding: [0xc3] after: _foo: ## @foo cmpl $1, 4(%esp) ## encoding: [0x83,0x7c,0x24,0x04,0x01] movl 8(%esp), %eax ## encoding: [0x8b,0x44,0x24,0x08] adcl $-1, %eax ## encoding: [0x83,0xd0,0xff] ret ## encoding: [0xc3] git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122455 91177308-0d34-0410-b5e6-96231b3b80d8		2010-12-22 23:17:45 +00:00
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CodeGen	DAGCombine add (sext i1), X into sub X, (zext i1) if sext from i1 is illegal. The latter usually compiles into smaller code.	2010-12-22 23:17:45 +00:00
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MC	MC/Mach-O/ARM: Don't try to use scattered relocs for BR24 fixups.	2010-12-22 21:26:43 +00:00
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Transforms	InstCombine: creating selects from -1 and 0 is fine, they combine into a sext from i1.	2010-12-22 23:12:15 +00:00
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lit.cfg	Revert 122341. It breaks some darwin tests.	2010-12-21 17:25:43 +00:00
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