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Add SIL syntax for declaring debug variables.

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Debug variable info may be attached to debug_value, debug_value_addr,
alloc_box, and alloc_stack instructions.

In order to write textual SIL -> SIL testcases that exercise the handling
of debug information by SIL passes, we need to make a couple of additions
to the textual SIL language. In memory, the debug information attached to
SIL instructions references information from the AST. If we want to create
debug info from parsing a textual .sil file, these bits need to be made
explicit.

Performance Notes: This is memory neutral for compilations from Swift
source code, because the variable name is still stored in the AST. For
compilations from textual source the variable name is stored in tail-
allocated memory following the SIL instruction that introduces the
variable.

<rdar://problem/22707128>
This commit is contained in:
Adrian Prantl
2015-12-14 09:59:13 -08:00
parent e6442dc9b2
commit 64cbec3805
79 changed files with 593 additions and 414 deletions
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18
test/SILGen/if_while_binding.swift
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@@ -37,7 +37,7 @@ func if_else_chain() {
// CHECK: switch_enum [[XVAL]] : $Optional<String>, case #Optional.Some!enumelt.1: [[YESX:bb[0-9]+]], default [[NOX:bb[0-9]+]]
if let x = foo() {
// CHECK: [[YESX]]([[XVAL:%[0-9]+]] : $String):
// CHECK: debug_value [[XVAL]] : $String // let x
// CHECK: debug_value [[XVAL]] : $String, let, name "x"
// CHECK: [[A:%.*]] = function_ref @_TF16if_while_binding1aFSST_
// CHECK: retain_value [[XVAL]]
// CHECK: apply [[A]]([[XVAL]])
@@ -102,7 +102,7 @@ func while_loop() {
// CHECK-LABEL: sil hidden @_TF16if_while_binding18while_loop_generic
// CHECK: br [[COND:bb[0-9]+]]
// CHECK: [[COND]]:
// CHECK: [[X:%.*]] = alloc_stack $T // let x
// CHECK: [[X:%.*]] = alloc_stack $T, let, name "x"
// CHECK: [[OPTBUF:%[0-9]+]] = alloc_stack $Optional<T>
// CHECK: switch_enum_addr {{.*}}, case #Optional.Some!enumelt.1: [[LOOPBODY:bb.*]], default [[OUT:bb[0-9]+]]
// CHECK: [[OUT]]:
@@ -130,7 +130,7 @@ func while_loop_multi() {
// CHECK: switch_enum {{.*}}, case #Optional.Some!enumelt.1: [[CHECKBUF2:bb.*]], default [[LOOP_EXIT0:bb[0-9]+]]
// CHECK: [[CHECKBUF2]]([[A:%[0-9]+]] : $String):
// CHECK: debug_value [[A]] : $String // let a
// CHECK: debug_value [[A]] : $String, let, name "a"
// CHECK: switch_enum {{.*}}, case #Optional.Some!enumelt.1: [[LOOP_BODY:bb.*]], default [[LOOP_EXIT2a:bb[0-9]+]]
@@ -140,8 +140,8 @@ func while_loop_multi() {
// CHECK: [[LOOP_BODY]]([[B:%[0-9]+]] : $String):
while let a = foo(), b = bar() {
// CHECK: debug_value [[B]] : $String // let b
// CHECK: debug_value [[A]] : $String // let c
// CHECK: debug_value [[B]] : $String, let, name "b"
// CHECK: debug_value [[A]] : $String, let, name "c"
// CHECK: release_value [[B]]
// CHECK: release_value [[A]]
// CHECK: br [[LOOP_ENTRY]]
@@ -262,7 +262,7 @@ func if_multi_where() {
func if_leading_boolean(a : Int) {
// Test the boolean condition.
// CHECK: debug_value %0 : $Int // let a
// CHECK: debug_value %0 : $Int, let, name "a"
// CHECK: [[EQRESULT:%[0-9]+]] = apply {{.*}}(%0, %0) : $@convention(thin) (Int, Int) -> Bool
// CHECK-NEXT: [[EQRESULTI1:%[0-9]+]] = apply %2([[EQRESULT]]) : $@convention(method) (Bool) -> Builtin.Int1
@@ -275,8 +275,8 @@ func if_leading_boolean(a : Int) {
// CHECK: switch_enum [[OPTRESULT]] : $Optional<String>, case #Optional.Some!enumelt.1: [[SUCCESS:bb.*]], default [[IF_DONE:bb[0-9]+]]
// CHECK: [[SUCCESS]]([[B:%[0-9]+]] : $String):
// CHECK-NEXT: debug_value [[B:%[0-9]+]] : $String // let b
// CHECK-NEXT: debug_value [[B:%[0-9]+]] : $String // let c
// CHECK-NEXT: debug_value [[B:%[0-9]+]] : $String, let, name "b"
// CHECK-NEXT: debug_value [[B:%[0-9]+]] : $String, let, name "c"
// CHECK-NEXT: release_value [[B]]
// CHECK-NEXT: br [[IFDONE]]
if a == a, let b = foo() {
@@ -295,7 +295,7 @@ class DerivedClass : BaseClass {}
// CHECK-LABEL: sil hidden @_TF16if_while_binding20testAsPatternInIfLetFGSqCS_9BaseClass_T_
func testAsPatternInIfLet(a : BaseClass?) {
// CHECK: bb0(%0 : $Optional<BaseClass>):
// CHECK-NEXT: debug_value %0 : $Optional<BaseClass> // let a
// CHECK-NEXT: debug_value %0 : $Optional<BaseClass>, let, name "a"
// CHECK-NEXT: retain_value %0 : $Optional<BaseClass>
// CHECK-NEXT: switch_enum %0 : $Optional<BaseClass>, case #Optional.Some!enumelt.1: [[OPTPRESENTBB:bb[0-9]+]], default [[NILBB:bb[0-9]+]]