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Add a calling convention to all function signatures.

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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.
This commit is contained in:
Jakob Stoklund Olesen
2017-08-02 16:40:35 -07:00
committed by Jakob Stoklund Olesen
parent bf1820587c
commit 7f3b807597
27 changed files with 211 additions and 144 deletions
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26
filetests/parser/call.cton
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@@ -5,18 +5,18 @@ function %mini() {
ebb1:
return
}
; sameln: function %mini() {
; sameln: function %mini() native {
; nextln: ebb0:
; nextln: return
; nextln: }
function %r1() -> i32, f32 {
function %r1() -> i32, f32 spiderwasm {
ebb1:
v1 = iconst.i32 3
v2 = f32const 0.0
return v1, v2
}
; sameln: function %r1() -> i32, f32 {
; sameln: function %r1() -> i32, f32 spiderwasm {
; nextln: ebb0:
; nextln: $v1 = iconst.i32 3
; nextln: $v2 = f32const 0.0
@@ -24,15 +24,15 @@ ebb1:
; nextln: }
function %signatures() {
sig10 = signature()
sig11 = signature(i32, f64) -> i32, b1
sig10 = ()
sig11 = (i32, f64) -> i32, b1 spiderwasm
fn5 = sig11 %foo
fn8 = function %bar(i32) -> b1
}
; sameln: function %signatures() {
; nextln: $sig10 = signature()
; nextln: $sig11 = signature(i32, f64) -> i32, b1
; nextln: sig2 = signature(i32) -> b1
; sameln: function %signatures() native {
; nextln: $sig10 = () native
; nextln: $sig11 = (i32, f64) -> i32, b1 spiderwasm
; nextln: sig2 = (i32) -> b1 native
; nextln: $fn5 = $sig11 %foo
; nextln: $fn8 = sig2 %bar
; nextln: }
@@ -54,9 +54,9 @@ ebb0:
; check: return
function %indirect(i64) {
sig0 = signature(i64)
sig1 = signature() -> i32
sig2 = signature() -> i32, f32
sig0 = (i64)
sig1 = () -> i32
sig2 = () -> i32, f32
ebb0(v0: i64):
v1 = call_indirect sig1, v0()
@@ -74,7 +74,7 @@ function %special1(i32 sret, i32 fp, i32 csr, i32 link) -> i32 link, i32 fp, i32
ebb0(v1: i32, v2: i32, v3: i32, v4: i32):
return v4, v2, v3, v1
}
; check: function %special1(i32 sret, i32 fp, i32 csr, i32 link) -> i32 link, i32 fp, i32 csr, i32 sret {
; check: function %special1(i32 sret, i32 fp, i32 csr, i32 link) -> i32 link, i32 fp, i32 csr, i32 sret native {
; check: ebb0($v1: i32, $v2: i32, $v3: i32, $v4: i32):
; check: return $v4, $v2, $v3, $v1
; check: }