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llvm-project/llvm/test/MC/PowerPC/ppc-nop.s

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[PowerPC] Generate little-endian object files As a first step towards real little-endian code generation, this patch changes the PowerPC MC layer to actually generate little-endian object files. This involves passing the little-endian flag through the various layers, including down to createELFObjectWriter so we actually get basic little-endian ELF objects, emitting instructions in little-endian order, and handling fixups and relocations as appropriate for little-endian. The bulk of the patch is to update most test cases in test/MC/PowerPC to verify both big- and little-endian encodings. (The only test cases *not* updated are those that create actual big-endian ABI code, like the TLS tests.) Note that while the object files are now little-endian, the generated code itself is not yet updated, in particular, it still does not adhere to the ELFv2 ABI. llvm-svn: 204634
2014-03-25 02:16:09 +08:00
# RUN: llvm-mc -filetype=obj -triple=powerpc-unknown-linux-gnu %s | llvm-readobj -s -sd - | FileCheck -check-prefix=CHECK-BE %s
# RUN: llvm-mc -filetype=obj -triple=powerpc64-unknown-linux-gnu %s | llvm-readobj -s -sd - | FileCheck -check-prefix=CHECK-BE %s
# RUN: llvm-mc -filetype=obj -triple=powerpc64le-unknown-linux-gnu %s | llvm-readobj -s -sd - | FileCheck -check-prefix=CHECK-LE %s
[PowerPC] Implement writeNopData This implements a proper PPCAsmBackend::writeNopData routine that actually writes PowerPC nop instructions. This fixes the last remaining difference in object file output (text section) between the integrated assembler and GNU as that I've seen anywhere. llvm-svn: 185662
2013-07-05 02:28:46 +08:00
blr
.p2align 3
blr
PPC: Allow partial fills in writeNopData() When asked to pad an irregular number of bytes, we should fill with zeros. This is consistent with the behavior specified in the AIX Assembler Language Reference as well as other LLVM and binutils assemblers. N.B. There is a small deviation from binutils' PPC assembler: when handling pads which are greater than 4 bytes but not mod 4, binutils will not emit any NOP sequences at all and only use zeros. This may or may not be a bug but there is no excellent rationale as to why that behavior is important to emulate. If that behavior is needed, we can change writeNopData() to behave in the same way. This fixes PR17352. llvm-svn: 191426
2013-09-26 17:18:48 +08:00
.byte 0x42
.p2align 2
[PowerPC] Generate little-endian object files As a first step towards real little-endian code generation, this patch changes the PowerPC MC layer to actually generate little-endian object files. This involves passing the little-endian flag through the various layers, including down to createELFObjectWriter so we actually get basic little-endian ELF objects, emitting instructions in little-endian order, and handling fixups and relocations as appropriate for little-endian. The bulk of the patch is to update most test cases in test/MC/PowerPC to verify both big- and little-endian encodings. (The only test cases *not* updated are those that create actual big-endian ABI code, like the TLS tests.) Note that while the object files are now little-endian, the generated code itself is not yet updated, in particular, it still does not adhere to the ELFv2 ABI. llvm-svn: 204634
2014-03-25 02:16:09 +08:00
# CHECK-BE: 0000: 4E800020 60000000 4E800020 42000000
# CHECK-LE: 0000: 2000804E 00000060 2000804E 42000000
[PowerPC] Implement writeNopData This implements a proper PPCAsmBackend::writeNopData routine that actually writes PowerPC nop instructions. This fixes the last remaining difference in object file output (text section) between the integrated assembler and GNU as that I've seen anywhere. llvm-svn: 185662
2013-07-05 02:28:46 +08:00