ldr-pseudo-parse-errors.s - OpenGrok history log for /llvm-project/llvm/test/MC/ARM/ldr-pseudo-parse-errors.s

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# 13cef35c	04-Dec-2014	Asiri Rathnayake <asiri.rathnayake@arm.com>	Fix yet another unseen regression caused by r223113 r223113 added support for ARM modified immediate assembly syntax. Which assumes all immediate operands are prefixed with a '#'. This assumption is Fix yet another unseen regression caused by r223113 r223113 added support for ARM modified immediate assembly syntax. Which assumes all immediate operands are prefixed with a '#'. This assumption is wrong as per the ARMARM - which recommends that all '#' characters be treated optional. The current patch fixes this regression and adds a test case. A follow-up patch will expand the test coverage to other instructions. llvm-svn: 223381 show more ...
Revision tags: llvmorg-3.5.0, llvmorg-3.5.0-rc4, llvmorg-3.5.0-rc3, llvmorg-3.5.0-rc2, llvmorg-3.5.0-rc1, llvmorg-3.4.2, llvmorg-3.4.2-rc1, llvmorg-3.4.1, llvmorg-3.4.1-rc2, llvmorg-3.4.1-rc1, llvmorg-3.4.0
# e407d093	19-Dec-2013	David Peixotto <dpeixott@codeaurora.org>	Implement the ldr-pseudo opcode for ARM assembly The ldr-pseudo opcode is a convenience for loading 32-bit constants. It is converted into a pc-relative load from a constant pool. For example, ld Implement the ldr-pseudo opcode for ARM assembly The ldr-pseudo opcode is a convenience for loading 32-bit constants. It is converted into a pc-relative load from a constant pool. For example, ldr r0, =0x10001 ldr r1, =bar will generate this output in the final assembly ldr r0, .Ltmp0 ldr r1, .Ltmp1 ... .Ltmp0: .long 0x10001 .Ltmp1: .long bar Sketch of the LDR pseudo implementation: Keep a map from Section => ConstantPool When parsing ldr r0, =val parse val as an MCExpr get ConstantPool for current Section Label = CreateTempSymbol() remember val in ConstantPool at next free slot add operand to ldr that is MCSymbolRef of Label On finishParse() callback Write out all non-empty constant pools for each Entry in ConstantPool Emit Entry.Label Emit Entry.Value Possible improvements to be added in a later patch: 1. Does not convert load of small constants to mov (e.g. ldr r0, =0x1 => mov r0, 0x1) 2. Does reuse constant pool entries for same constant The implementation was tested for ARM, Thumb1, and Thumb2 targets on linux and darwin. llvm-svn: 197708 show more ...