5 Commits

Author	SHA1	Message	Date
Sanjay Patel	a84fd041c6	[x86] check for commuted add pattern to find ADC/SBB ... llvm-svn: 296933	2017-03-04 00:18:31 +00:00
Sanjay Patel	71c1958fca	[x86] add test to show failed recognition of commuted pattern; NFC ... llvm-svn: 296931	2017-03-04 00:06:37 +00:00
Sanjay Patel	000d61acfd	[x86] regenerate checks; NFC ... llvm-svn: 296908	2017-03-03 20:48:54 +00:00
Stephen Lin	f799e3f944	Convert CodeGen/*/*.ll tests to use the new CHECK-LABEL for easier debugging. No functionality change and all tests pass after conversion. ... This was done with the following sed invocation to catch label lines demarking function boundaries: sed -i '' "s/^;\( *\)\([A-Z0-9_]*\):\( *\)test\([A-Za-z0-9_-]*\):\( *\)$/;\1\2-LABEL:\3test\4:\5/g" test/CodeGen/*/*.ll which was written conservatively to avoid false positives rather than false negatives. I scanned through all the changes and everything looks correct. llvm-svn: 186258	2013-07-13 20:38:47 +00:00
Benjamin Kramer	f6ddc4a1de	Add some x86 specific dagcombines for conditional increments. ... (add Y, (sete X, 0)) -> cmp X, 1; adc 0, Y (add Y, (setne X, 0)) -> cmp X, 1; sbb -1, Y (sub (sete X, 0), Y) -> cmp X, 1; sbb 0, Y (sub (setne X, 0), Y) -> cmp X, 1; adc -1, Y for unsigned foo(unsigned a, unsigned b) { if (a == 0) b++; return b; } we now get: foo: cmpl $1, %edi movl %esi, %eax adcl $0, %eax ret instead of: foo: testl %edi, %edi sete %al movzbl %al, %eax addl %esi, %eax ret llvm-svn: 122364	2010-12-21 21:41:44 +00:00