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.
33 lines
1.0 KiB
Plaintext
33 lines
1.0 KiB
Plaintext
; Test the legalization of function signatures.
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test legalizer
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isa riscv
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; regex: V=v\d+
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function %f() {
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sig0 = (i32) -> i32 native
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; check: sig0 = (i32 [%x10]) -> i32 [%x10] native
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sig1 = (i64) -> b1 native
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; check: sig1 = (i32 [%x10], i32 [%x11]) -> b1 [%x10] native
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; The i64 argument must go in an even-odd register pair.
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sig2 = (f32, i64) -> f64 native
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; check: sig2 = (f32 [%f10], i32 [%x12], i32 [%x13]) -> f64 [%f10] native
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; Spilling into the stack args.
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sig3 = (f64, f64, f64, f64, f64, f64, f64, i64) -> f64 native
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; check: sig3 = (f64 [%f10], f64 [%f11], f64 [%f12], f64 [%f13], f64 [%f14], f64 [%f15], f64 [%f16], i32 [0], i32 [4]) -> f64 [%f10] native
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; Splitting vectors.
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sig4 = (i32x4) native
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; check: sig4 = (i32 [%x10], i32 [%x11], i32 [%x12], i32 [%x13]) native
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; Splitting vectors, then splitting ints.
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sig5 = (i64x4) native
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; check: sig5 = (i32 [%x10], i32 [%x11], i32 [%x12], i32 [%x13], i32 [%x14], i32 [%x15], i32 [%x16], i32 [%x17]) native
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ebb0:
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return
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}
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