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| author | Venkatraman Govindaraju <venkatra@cs.wisc.edu> | 2014-03-01 05:45:09 +0000 |
|---|---|---|
| committer | Venkatraman Govindaraju <venkatra@cs.wisc.edu> | 2014-03-01 05:45:09 +0000 |
| commit | 5ddaa6dcf40fc691e28f18f33eb74e283a3d3ca4 (patch) | |
| tree | f9088bf8706193fbc48f1d185f21f65ece092120 | |
| parent | e0c7e3d1397e1b4ffe82c4167958a6570a37ae8d (diff) | |
| download | llvm-5ddaa6dcf40fc691e28f18f33eb74e283a3d3ca4.tar.gz llvm-5ddaa6dcf40fc691e28f18f33eb74e283a3d3ca4.tar.bz2 llvm-5ddaa6dcf40fc691e28f18f33eb74e283a3d3ca4.tar.xz | |
[Sparc] Implement writeNopData. Emit actual NOP instruction instead of just filling with zeroes.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@202572 91177308-0d34-0410-b5e6-96231b3b80d8
| -rw-r--r-- | lib/Target/Sparc/MCTargetDesc/SparcAsmBackend.cpp | 11 | ||||
| -rw-r--r-- | test/MC/Sparc/sparc-nop-data.s | 11 |
2 files changed, 19 insertions, 3 deletions
diff --git a/lib/Target/Sparc/MCTargetDesc/SparcAsmBackend.cpp b/lib/Target/Sparc/MCTargetDesc/SparcAsmBackend.cpp index 812f4b73bd..f6c5816549 100644 --- a/lib/Target/Sparc/MCTargetDesc/SparcAsmBackend.cpp +++ b/lib/Target/Sparc/MCTargetDesc/SparcAsmBackend.cpp @@ -200,9 +200,14 @@ namespace { } bool writeNopData(uint64_t Count, MCObjectWriter *OW) const { - // FIXME: Zero fill for now. - for (uint64_t i = 0; i != Count; ++i) - OW->Write8(0); + // Cannot emit NOP with size not multiple of 32 bits. + if (Count % 4 != 0) + return false; + + uint64_t NumNops = Count / 4; + for (uint64_t i = 0; i != NumNops; ++i) + OW->Write32(0x01000000); + return true; } diff --git a/test/MC/Sparc/sparc-nop-data.s b/test/MC/Sparc/sparc-nop-data.s new file mode 100644 index 0000000000..1538505af7 --- /dev/null +++ b/test/MC/Sparc/sparc-nop-data.s @@ -0,0 +1,11 @@ +! RUN: llvm-mc %s -arch=sparc -filetype=obj | llvm-readobj -s -sd | FileCheck %s +! RUN: llvm-mc %s -arch=sparcv9 -filetype=obj | llvm-readobj -s -sd | FileCheck %s + +! CHECK: 0000: BA1F401D 01000000 01000000 01000000 +! CHECK: 0010: BA1F401D + +foo: + xor %i5, %i5, %i5 + .align 16 + xor %i5, %i5, %i5 + |