7f3b807597
A CallConv enum on every function signature makes it possible to
generate calls to functions with different calling conventions within
the same ISA / within a single function.
The calling conventions also serve as a way of customizing Cretonne's
behavior when embedded inside a VM. As an example, the SpiderWASM
calling convention is used to compile WebAssembly functions that run
inside the SpiderMonkey virtual machine.
All function signatures must have a calling convention at the end, so
this changes the textual IL syntax.
Before:
sig1 = signature(i32, f64) -> f64
After
sig1 = (i32, f64) -> f64 native
sig2 = (i32) spiderwasm
When printing functions, the signature goes after the return types:
function %r1() -> i32, f32 spiderwasm {
ebb1:
...
}
In the parser, this calling convention is optional and defaults to
"native". This is mostly to avoid updating all the existing test cases
under filetests/. When printing a function, the calling convention is
always included, including for "native" functions.
38 lines
1.1 KiB
Plaintext
38 lines
1.1 KiB
Plaintext
; The .cton parser can't preserve the actual entity numbers in the input file
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; since entities are numbered as they are created. For entities declared in the
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; preamble, this is no problem, but for EBB and value references, mapping
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; source numbers to real numbers can be a problem.
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;
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; It is possible to refer to instructions and EBBs that have not yet been
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; defined in the lexical order, so the parser needs to rewrite these references
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; after the fact.
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test cat
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; Check that defining numbers are rewritten.
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function %defs() {
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ebb100(v20: i32):
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v1000 = iconst.i32x8 5
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v9200 = f64const 0x4.0p0
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trap
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}
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; sameln: function %defs() native {
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; nextln: $ebb100($v20: i32):
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; nextln: $v1000 = iconst.i32x8 5
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; nextln: $v9200 = f64const 0x1.0000000000000p2
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; nextln: trap
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; nextln: }
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; Using values.
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function %use_value() {
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ebb100(v20: i32):
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v1000 = iadd_imm v20, 5
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v200 = iadd v20, v1000
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jump ebb100(v1000)
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}
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; sameln: function %use_value() native {
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; nextln: ebb0($v20: i32):
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; nextln: $v1000 = iadd_imm $v20, 5
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; nextln: $v200 = iadd $v20, $v1000
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; nextln: jump ebb0($v1000)
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; nextln: }
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