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7a49f52054
- This patch attempts to implement the location counter syntax (*) for the HLASM variant for PC-relative instructions.
- In the HLASM variant, for purely constant relocatable values, we expect a * token preceding it, with special support for " *" which is parsed as "<pc-rel-insn 0>"
- For combinations of absolute values and relocatable values, we don't expect the "*" preceding the token.
When you have a " * " what’s accepted is:
```
*<space>.*{.*} -> <pc-rel-insn> 0
*[+|-][constant-value] -> <pc-rel-insn> [+|-]constant-value
```
When you don’t have a " * " what’s accepted is:
```
brasl 1,func is allowed (MCSymbolRef type)
brasl 1,func+4 is allowed (MCBinary type)
brasl 1,4+func is allowed (MCBinary type)
brasl 1,-4+func is allowed (MCBinary type)
brasl 1,func-4 is allowed (MCBinary type)
brasl 1,*func is not allowed (* cannot be used for non-MCConstantExprs)
brasl 1,*+func is not allowed (* cannot be used for non-MCConstantExprs)
brasl 1,*+func+4 is not allowed (* cannot be used for non-MCConstantExprs)
brasl 1,*+4+func is not allowed (* cannot be used for non-MCConstantExprs)
brasl 1,*-4+8+func is not allowed (* cannot be used for non-MCConstantExprs)
```
Reviewed By: Kai
Differential Revision: https://reviews.llvm.org/D100987
42 lines
773 B
ArmAsm
42 lines
773 B
ArmAsm
# RUN: not llvm-mc -triple i686-elf -filetype asm -o /dev/null %s 2>&1 \
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# RUN: | FileCheck %s
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.data
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.global invalid_expression
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.type invalid_expression,@object
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invalid_expression:
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.rept *
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# CHECK: error: invalid token in expression
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# CHECK: .rept *
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# CHECK: ^
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.global bad_token
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.type bad_token,@object
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bad_token:
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.rept bad_token
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# CHECK: error: unexpected token in '.rept' directive
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# CHECK: .rept bad_token
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# CHECK: ^
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.global negative
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.type negative,@object
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negative:
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.rept -32
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# CHECK: error: Count is negative
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# CHECK: .rept -32
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# CHECK: ^
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.global trailer
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.type trailer,@object
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trailer:
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.rep 0 trailer
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# CHECK: :[[#@LINE-2]]:9: error: expected newline
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# CHECK: .rep 0 trailer
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# CHECK: ^
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