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.
34 lines
769 B
Plaintext
34 lines
769 B
Plaintext
test verifier
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function %average(i32, i32) -> f32 native {
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ss1 = local 8 ; Stack slot for ``sum``.
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ebb1(v1: i32, v2: i32):
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v3 = f64const 0x0.0
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stack_store v3, ss1
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brz v2, ebb3 ; Handle count == 0.
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v4 = iconst.i32 0
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jump ebb2(v4)
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ebb2(v5: i32):
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v6 = imul_imm v5, 4
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v7 = iadd v1, v6
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v8 = heap_load.f32 v7 ; array[i]
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v9 = fpromote.f64 v8
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v10 = stack_load.f64 ss1
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v11 = fadd v9, v10
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stack_store v11, ss1
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v12 = iadd_imm v5, 1
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v13 = icmp ult v12, v2
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brnz v13, ebb2(v12) ; Loop backedge.
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v14 = stack_load.f64 ss1
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v15 = fcvt_from_uint.f64 v2
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v16 = fdiv v14, v15
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v17 = fdemote.f32 v16
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return v17
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ebb3:
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v100 = f32const +NaN
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return v100
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}
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