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9a5ffbfa6e
llvm/lib/Target/Mips
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Akira Hatanaka 0285e7d1c1 When constant double 0.0 is lowered, make sure 0 is copied directly from an 
integer register to a floating point register. It is not valid to interpret
the value of a floating pointer register as part of a double precision
floating point value after a single precision floating point computational
or move instruction stores its result to the register.

- In the test case, the following code is generated before this patch is
  applied:
mtc1  $zero, $f2    ; unformatted copy to $f2
mov.s $f0, $f2      ; $f0 is in single format
sdc1  $f12, 0($sp)
mov.s $f1, $f2      ; $f1 is in single format
c.eq.d  $f12, $f0   ; $f0 cannot be interpreted as double

- The following code is generated after this patch is applied:
mtc1  $zero, $f0    ; unformatted copy to $f0
mtc1  $zero, $f1    ; unformatted copy to $f1
c.eq.d  $f12, $f0   ; $f0 can be interpreted as double

Bhanu Chetlapalli and Chris Dearman at MIPS technologies reported this bug and
provided the test case.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137484 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-12 18:09:59 +00:00
..
InstPrinter Rewrite the CMake build to use explicit dependencies between libraries, 2011-07-29 00:14:25 +00:00
MCTargetDesc Rewrite the CMake build to use explicit dependencies between libraries, 2011-07-29 00:14:25 +00:00
TargetInfo Actually finish switching to the new system for Target sublibrary 2011-08-01 19:55:11 +00:00
CMakeLists.txt Rewrite the CMake build to use explicit dependencies between libraries, 2011-07-29 00:14:25 +00:00
Makefile Next round of MC refactoring. This patch factor MC table instantiations, MC 2011-07-14 20:59:42 +00:00
Mips.h Added the infrastructute necessary for MIPS JIT support. Patch by Vladimir 2011-07-21 16:28:51 +00:00
Mips.td Lower MachineInstr to MC Inst and print to .s files. 2011-07-07 23:56:50 +00:00
MipsAsmPrinter.cpp Separate MCInstPrinter registration from AsmPrinter registration. 2011-07-25 21:20:24 +00:00
MipsAsmPrinter.h Lower MachineInstr to MC Inst and print to .s files. 2011-07-07 23:56:50 +00:00
MipsCallingConv.td Add A0 and A1 to the list of registers used for returning a value in order to 2011-06-21 01:28:11 +00:00
MipsCodeEmitter.cpp Added the infrastructute necessary for MIPS JIT support. Patch by Vladimir 2011-07-21 16:28:51 +00:00
MipsDelaySlotFiller.cpp - Rename TargetInstrDesc, TargetOperandInfo to MCInstrDesc and MCOperandInfo and 2011-06-28 19:10:37 +00:00
MipsEmitGPRestore.cpp Reverse order of operands of address operand mem so that the base operand comes 2011-07-07 18:57:00 +00:00
MipsExpandPseudo.cpp - Rename TargetInstrDesc, TargetOperandInfo to MCInstrDesc and MCOperandInfo and 2011-06-28 19:10:37 +00:00
MipsFrameLowering.cpp Enclose directive .cprestore with .set macro and nomacro to silence assembler 2011-08-11 22:42:31 +00:00
MipsFrameLowering.h Move getInitialFrameState from TargetFrameInfo to MCAsmInfo (suggestions for 2011-07-18 22:29:13 +00:00
MipsInstrFormats.td Fix td file comments for Mips. 2011-05-09 18:16:46 +00:00
MipsInstrFPU.td Use tabs to separate opcode and operand strings. 2011-06-07 18:16:51 +00:00
MipsInstrInfo.cpp Next round of MC refactoring. This patch factor MC table instantiations, MC 2011-07-14 20:59:42 +00:00
MipsInstrInfo.h Lower MachineInstr to MC Inst and print to .s files. 2011-07-07 23:56:50 +00:00
MipsInstrInfo.td Add isIndirectBranch flag. 2011-08-11 21:05:37 +00:00
MipsISelDAGToDAG.cpp When constant double 0.0 is lowered, make sure 0 is copied directly from an 2011-08-12 18:09:59 +00:00
MipsISelLowering.cpp New approach to r136737: insert the necessary fences for atomic ops in platform-independent code, since a bunch of platforms (ARM, Mips, PPC, Alpha are the relevant targets here) need to do essentially the same thing. 2011-08-03 21:06:02 +00:00
MipsISelLowering.h Code generation for 'fence' instruction. 2011-07-27 22:21:52 +00:00
MipsJITInfo.cpp Added the infrastructute necessary for MIPS JIT support. Patch by Vladimir 2011-07-21 16:28:51 +00:00
MipsJITInfo.h Added the infrastructute necessary for MIPS JIT support. Patch by Vladimir 2011-07-21 16:28:51 +00:00
MipsMachineFunction.h Set mayLoad or mayStore flags for SC and LL in order to prevent LICM from 2011-07-18 18:52:12 +00:00
MipsMCInstLower.cpp Raise assertion when MachineOperand has unexpected target flag. 2011-07-08 00:42:35 +00:00
MipsMCInstLower.h Define class MipsMCInstLower. 2011-07-07 20:24:54 +00:00
MipsMCSymbolRefExpr.cpp Define class MipsMCSymbolRefExpr. 2011-07-07 19:27:22 +00:00
MipsMCSymbolRefExpr.h Define class MipsMCSymbolRefExpr. 2011-07-07 19:27:22 +00:00
MipsRegisterInfo.cpp Move getInitialFrameState from TargetFrameInfo to MCAsmInfo (suggestions for 2011-07-18 22:29:13 +00:00
MipsRegisterInfo.h Sink getDwarfRegNum, getLLVMRegNum, getSEHRegNum from TargetRegisterInfo down 2011-07-18 20:57:22 +00:00
MipsRegisterInfo.td Use set operations instead of plain lists to enumerate register classes. 2011-06-15 23:28:14 +00:00
MipsRelocations.h Added the infrastructute necessary for MIPS JIT support. Patch by Vladimir 2011-07-21 16:28:51 +00:00
MipsSchedule.td Reverse unnecessary changes made in r129606 and r129608. There is no change in functionality. 2011-04-15 21:51:11 +00:00
MipsSelectionDAGInfo.cpp Reverse unnecessary changes made in r129606 and r129608. There is no change in functionality. 2011-04-15 21:51:11 +00:00
MipsSelectionDAGInfo.h Reverse unnecessary changes made in r129606 and r129608. There is no change in functionality. 2011-04-15 21:51:11 +00:00
MipsSubtarget.cpp Next round of MC refactoring. This patch factor MC table instantiations, MC 2011-07-14 20:59:42 +00:00
MipsSubtarget.h Compute feature bits at time of MCSubtargetInfo initialization. 2011-07-07 07:07:08 +00:00
MipsTargetMachine.cpp Added the infrastructute necessary for MIPS JIT support. Patch by Vladimir 2011-07-21 16:28:51 +00:00
MipsTargetMachine.h Added the infrastructute necessary for MIPS JIT support. Patch by Vladimir 2011-07-21 16:28:51 +00:00
MipsTargetObjectFile.cpp land David Blaikie's patch to de-constify Type, with a few tweaks. 2011-07-18 04:54:35 +00:00
MipsTargetObjectFile.h Reverse unnecessary changes made in r129606 and r129608. There is no change in functionality. 2011-04-15 21:51:11 +00:00