tinygo/compiler/testdata/defer-cortex-m-qemu.ll
Ayke van Laethem 79ba6a50c3 compiler: insert basic blocks at an appropriate location
For example, this commit moves the 'throw' branch of an assertion (nil
check, slice index check, etc) to the end of the function while
inserting the "continue" branch right after the insert location. This
makes the resulting IR easier to follow.

For some reason, this also reduces code size a bit on average. The
TinyGo smoke tests saw a reduction of 0.22%, mainly from WebAssembly.
The drivers repo saw little average change in code size (-0.01%).

This commit also adds a few compiler tests for the defer keyword.
2022-06-16 07:59:21 +02:00

142 строки
6,2 КиБ
LLVM

; ModuleID = 'defer.go'
source_filename = "defer.go"
target datalayout = "e-m:e-p:32:32-Fi8-i64:64-v128:64:128-a:0:32-n32-S64"
target triple = "thumbv7m-unknown-unknown-eabi"
%runtime._defer = type { i32, %runtime._defer* }
declare noalias nonnull i8* @runtime.alloc(i32, i8*, i8*)
; Function Attrs: nounwind
define hidden void @main.init(i8* %context) unnamed_addr #0 {
entry:
ret void
}
declare void @main.external(i8*)
; Function Attrs: nounwind
define hidden void @main.deferSimple(i8* %context) unnamed_addr #0 {
entry:
%defer.alloca = alloca { i32, %runtime._defer* }, align 4
%deferPtr = alloca %runtime._defer*, align 4
store %runtime._defer* null, %runtime._defer** %deferPtr, align 4
%defer.alloca.repack = getelementptr inbounds { i32, %runtime._defer* }, { i32, %runtime._defer* }* %defer.alloca, i32 0, i32 0
store i32 0, i32* %defer.alloca.repack, align 4
%defer.alloca.repack1 = getelementptr inbounds { i32, %runtime._defer* }, { i32, %runtime._defer* }* %defer.alloca, i32 0, i32 1
store %runtime._defer* null, %runtime._defer** %defer.alloca.repack1, align 4
%0 = bitcast %runtime._defer** %deferPtr to { i32, %runtime._defer* }**
store { i32, %runtime._defer* }* %defer.alloca, { i32, %runtime._defer* }** %0, align 4
call void @main.external(i8* undef) #0
br label %rundefers.loophead
rundefers.loophead: ; preds = %rundefers.callback0, %entry
%1 = load %runtime._defer*, %runtime._defer** %deferPtr, align 4
%stackIsNil = icmp eq %runtime._defer* %1, null
br i1 %stackIsNil, label %rundefers.end, label %rundefers.loop
rundefers.loop: ; preds = %rundefers.loophead
%stack.next.gep = getelementptr inbounds %runtime._defer, %runtime._defer* %1, i32 0, i32 1
%stack.next = load %runtime._defer*, %runtime._defer** %stack.next.gep, align 4
store %runtime._defer* %stack.next, %runtime._defer** %deferPtr, align 4
%callback.gep = getelementptr inbounds %runtime._defer, %runtime._defer* %1, i32 0, i32 0
%callback = load i32, i32* %callback.gep, align 4
switch i32 %callback, label %rundefers.default [
i32 0, label %rundefers.callback0
]
rundefers.callback0: ; preds = %rundefers.loop
call void @"main.deferSimple$1"(i8* undef)
br label %rundefers.loophead
rundefers.default: ; preds = %rundefers.loop
unreachable
rundefers.end: ; preds = %rundefers.loophead
ret void
recover: ; No predecessors!
ret void
}
; Function Attrs: nounwind
define hidden void @"main.deferSimple$1"(i8* %context) unnamed_addr #0 {
entry:
call void @runtime.printint32(i32 3, i8* undef) #0
ret void
}
declare void @runtime.printint32(i32, i8*)
; Function Attrs: nounwind
define hidden void @main.deferMultiple(i8* %context) unnamed_addr #0 {
entry:
%defer.alloca2 = alloca { i32, %runtime._defer* }, align 4
%defer.alloca = alloca { i32, %runtime._defer* }, align 4
%deferPtr = alloca %runtime._defer*, align 4
store %runtime._defer* null, %runtime._defer** %deferPtr, align 4
%defer.alloca.repack = getelementptr inbounds { i32, %runtime._defer* }, { i32, %runtime._defer* }* %defer.alloca, i32 0, i32 0
store i32 0, i32* %defer.alloca.repack, align 4
%defer.alloca.repack5 = getelementptr inbounds { i32, %runtime._defer* }, { i32, %runtime._defer* }* %defer.alloca, i32 0, i32 1
store %runtime._defer* null, %runtime._defer** %defer.alloca.repack5, align 4
%0 = bitcast %runtime._defer** %deferPtr to { i32, %runtime._defer* }**
store { i32, %runtime._defer* }* %defer.alloca, { i32, %runtime._defer* }** %0, align 4
%defer.alloca2.repack = getelementptr inbounds { i32, %runtime._defer* }, { i32, %runtime._defer* }* %defer.alloca2, i32 0, i32 0
store i32 1, i32* %defer.alloca2.repack, align 4
%defer.alloca2.repack6 = getelementptr inbounds { i32, %runtime._defer* }, { i32, %runtime._defer* }* %defer.alloca2, i32 0, i32 1
%1 = bitcast %runtime._defer** %defer.alloca2.repack6 to { i32, %runtime._defer* }**
store { i32, %runtime._defer* }* %defer.alloca, { i32, %runtime._defer* }** %1, align 4
%2 = bitcast %runtime._defer** %deferPtr to { i32, %runtime._defer* }**
store { i32, %runtime._defer* }* %defer.alloca2, { i32, %runtime._defer* }** %2, align 4
call void @main.external(i8* undef) #0
br label %rundefers.loophead
rundefers.loophead: ; preds = %rundefers.callback1, %rundefers.callback0, %entry
%3 = load %runtime._defer*, %runtime._defer** %deferPtr, align 4
%stackIsNil = icmp eq %runtime._defer* %3, null
br i1 %stackIsNil, label %rundefers.end, label %rundefers.loop
rundefers.loop: ; preds = %rundefers.loophead
%stack.next.gep = getelementptr inbounds %runtime._defer, %runtime._defer* %3, i32 0, i32 1
%stack.next = load %runtime._defer*, %runtime._defer** %stack.next.gep, align 4
store %runtime._defer* %stack.next, %runtime._defer** %deferPtr, align 4
%callback.gep = getelementptr inbounds %runtime._defer, %runtime._defer* %3, i32 0, i32 0
%callback = load i32, i32* %callback.gep, align 4
switch i32 %callback, label %rundefers.default [
i32 0, label %rundefers.callback0
i32 1, label %rundefers.callback1
]
rundefers.callback0: ; preds = %rundefers.loop
call void @"main.deferMultiple$1"(i8* undef)
br label %rundefers.loophead
rundefers.callback1: ; preds = %rundefers.loop
call void @"main.deferMultiple$2"(i8* undef)
br label %rundefers.loophead
rundefers.default: ; preds = %rundefers.loop
unreachable
rundefers.end: ; preds = %rundefers.loophead
ret void
recover: ; No predecessors!
ret void
}
; Function Attrs: nounwind
define hidden void @"main.deferMultiple$1"(i8* %context) unnamed_addr #0 {
entry:
call void @runtime.printint32(i32 3, i8* undef) #0
ret void
}
; Function Attrs: nounwind
define hidden void @"main.deferMultiple$2"(i8* %context) unnamed_addr #0 {
entry:
call void @runtime.printint32(i32 5, i8* undef) #0
ret void
}
attributes #0 = { nounwind }