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* X86: Don't emit conditional floating point moves on when targeting ↵Benjamin Kramer2012-04-27
| | | | | | | | | | | | | | | | pre-pentiumpro architectures. * Model FPSW (the FPU status word) as a register. * Add ISel patterns for the FUCOM*, FNSTSW and SAHF instructions. * During Legalize/Lowering, build a node sequence to transfer the comparison result from FPSW into EFLAGS. If you're wondering about the right-shift: That's an implicit sub-register extraction (%ax -> %ah) which is handled later on by the instruction selector. Fixes PR6679. Patch by Christoph Erhardt! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@155704 91177308-0d34-0410-b5e6-96231b3b80d8
* Have the X86 back-end emit the alias instead of what's being aliased. In mostBill Wendling2011-04-14
| | | | | | | cases, it's much nicer and more informative reading the alias. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129497 91177308-0d34-0410-b5e6-96231b3b80d8
* go to great lengths to work around a GAS bug my previous patchChris Lattner2010-11-06
| | | | | | | | | | | | | | | | | exposed: GAS doesn't accept "fcomip %st(1)", it requires "fcomip %st(1), %st(0)" even though st(0) is implicit in all other fp stack instructions. Fortunately, there is an alias for fcomip named "fcompi" and gas does accept the default argument for the alias (boggle!). As such, switch the canonical form of this instruction to "pi" instead of "ip". This makes the code generator and disassembler generate pi, avoiding the gas bug. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118356 91177308-0d34-0410-b5e6-96231b3b80d8
* Eliminate more uses of llvm-as and llvm-dis.Dan Gohman2009-09-08
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81290 91177308-0d34-0410-b5e6-96231b3b80d8
* Split the Add, Sub, and Mul instruction opcodes into separateDan Gohman2009-06-04
| | | | | | | | | | | | | | | | integer and floating-point opcodes, introducing FAdd, FSub, and FMul. For now, the AsmParser, BitcodeReader, and IRBuilder all preserve backwards compatability, and the Core LLVM APIs preserve backwards compatibility for IR producers. Most front-ends won't need to change immediately. This implements the first step of the plan outlined here: http://nondot.org/sabre/LLVMNotes/IntegerOverflow.txt git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@72897 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove llvm-upgrade and update tests.Tanya Lattner2008-02-21
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47432 91177308-0d34-0410-b5e6-96231b3b80d8
* For PR1319: Upgrade to new test harness.Reid Spencer2007-04-15
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36091 91177308-0d34-0410-b5e6-96231b3b80d8
* Use the llvm-upgrade program to upgrade llvm assembly.Reid Spencer2006-12-02
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32115 91177308-0d34-0410-b5e6-96231b3b80d8
* Testcase for pr1012Chris Lattner2006-11-20
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31875 91177308-0d34-0410-b5e6-96231b3b80d8
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