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all: add compiler support for interrupts

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This commit lets the compiler know about interrupts and allows
optimizations to be performed based on that: interrupts are eliminated
when they appear to be unused in a program. This is done with a new
pseudo-call (runtime/interrupt.New) that is treated specially by the
compiler.
This commit is contained in:
Ayke van Laethem
2019-12-15 14:16:22 +01:00
committed by Ron Evans
parent 3729fcfa9e
commit a5ed993f8d
36 changed files with 766 additions and 199 deletions
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transform/testdata/interrupt-avr.ll
Vendored
+33
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target datalayout = "e-P1-p:16:8-i8:8-i16:8-i32:8-i64:8-f32:8-f64:8-n8-a:8"
target triple = "avr-atmel-none"
%"runtime/interrupt.handle" = type { %runtime.funcValue, %"runtime/interrupt.Interrupt" } %runtime.funcValue = type { i8*, i16 }
%runtime.typecodeID = type { %runtime.typecodeID*, i16 }
%runtime.funcValueWithSignature = type { i16, %runtime.typecodeID* }
%machine.UART = type { %machine.RingBuffer* }
%machine.RingBuffer = type { [128 x %"runtime/volatile.Register8"], %"runtime/volatile.Register8", %"runtime/volatile.Register8" }
%"runtime/volatile.Register8" = type { i8 }
%"runtime/interrupt.Interrupt" = type { i32 }
@"reflect/types.type:func:{named:runtime/interrupt.Interrupt}{}" = external constant %runtime.typecodeID
@"(machine.UART).Configure$1$withSignature" = internal constant %runtime.funcValueWithSignature { i16 ptrtoint (void (i32, i8*, i8*) addrspace(1)* @"(machine.UART).Configure$1" to i16), %runtime.typecodeID* @"reflect/types.type:func:{named:runtime/interrupt.Interrupt}{}" }
@"runtime/interrupt.$interrupt18" = private unnamed_addr constant %"runtime/interrupt.handle" { %runtime.funcValue { i8* undef, i16 ptrtoint (%runtime.funcValueWithSignature* @"(machine.UART).Configure$1$withSignature" to i16) }, %"runtime/interrupt.Interrupt" { i32 18 } }
@machine.UART0 = internal global %machine.UART zeroinitializer
@"device/avr.init$string.18" = internal unnamed_addr constant [17 x i8] c"__vector_USART_RX"
declare void @"(machine.UART).Configure$1"(i32, i8*, i8*) unnamed_addr addrspace(1)
declare i32 @"runtime/interrupt.Register"(i32, i8*, i16, i8*, i8*) addrspace(1)
declare void @"runtime/interrupt.use"(%"runtime/interrupt.Interrupt") addrspace(1)
define void @"(machine.UART).Configure"(%machine.RingBuffer*, i32, i8, i8, i8* %context, i8* %parentHandle) unnamed_addr addrspace(1) {
call addrspace(1) void @"runtime/interrupt.use"(%"runtime/interrupt.Interrupt" { i32 ptrtoint (%"runtime/interrupt.handle"* @"runtime/interrupt.$interrupt18" to i32) })
ret void
}
define void @"device/avr.init"(i8* %context, i8* %parentHandle) unnamed_addr addrspace(1) {
entry:
%0 = call addrspace(1) i32 @"runtime/interrupt.Register"(i32 18, i8* getelementptr inbounds ([17 x i8], [17 x i8]* @"device/avr.init$string.18", i32 0, i32 0), i16 17, i8* undef, i8* undef)
ret void
}