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llvm-mirror/test/CodeGen/ARM/dwarf-eh.ll
Rafael Espindola 1198708f0f Emit smaller exception tables for non-SJLJ mode.
* Use uleb128 for code offsets in the LSDA call site table.
* Omit the TTBase offset if the type table is empty.

This change can reduce the size of the DWARF/Itanium LSDA by about half.

Patch by Ryan Prichard!

llvm-svn: 324750
2018-02-09 17:13:37 +00:00

72 lines
2.3 KiB
LLVM

; RUN: llc -mtriple=arm-netbsd-eabi -o - -filetype=asm %s | \
; RUN: FileCheck %s
; RUN: llc -mtriple=arm-netbsd-eabi -o - -filetype=asm %s \
; RUN: -relocation-model=pic | FileCheck -check-prefix=CHECK-PIC %s
; ModuleID = 'test.cc'
target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:64:128-a0:0:64-n32-S64"
target triple = "armv5e--netbsd-eabi"
%struct.exception = type { i8 }
@_ZTVN10__cxxabiv117__class_type_infoE = external global i8*
@_ZTS9exception = linkonce_odr constant [11 x i8] c"9exception\00"
@_ZTI9exception = linkonce_odr unnamed_addr constant { i8*, i8* } { i8* bitcast (i8** getelementptr inbounds (i8*, i8** @_ZTVN10__cxxabiv117__class_type_infoE, i32 2) to i8*), i8* getelementptr inbounds ([11 x i8], [11 x i8]* @_ZTS9exception, i32 0, i32 0) }
define void @f() uwtable personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*) {
%1 = alloca i8*
%2 = alloca i32
%e = alloca %struct.exception*, align 4
invoke void @g()
to label %3 unwind label %4
br label %16
%5 = landingpad { i8*, i32 }
catch i8* bitcast ({ i8*, i8* }* @_ZTI9exception to i8*)
%6 = extractvalue { i8*, i32 } %5, 0
store i8* %6, i8** %1
%7 = extractvalue { i8*, i32 } %5, 1
store i32 %7, i32* %2
br label %8
%9 = load i32, i32* %2
%10 = call i32 @llvm.eh.typeid.for(i8* bitcast ({ i8*, i8* }* @_ZTI9exception to i8*)) nounwind
%11 = icmp eq i32 %9, %10
br i1 %11, label %12, label %17
%13 = load i8*, i8** %1
%14 = call i8* @__cxa_begin_catch(i8* %13) #3
%15 = bitcast i8* %14 to %struct.exception*
store %struct.exception* %15, %struct.exception** %e
call void @__cxa_end_catch()
br label %16
ret void
%18 = load i8*, i8** %1
%19 = load i32, i32* %2
%20 = insertvalue { i8*, i32 } undef, i8* %18, 0
%21 = insertvalue { i8*, i32 } %20, i32 %19, 1
resume { i8*, i32 } %21
}
declare void @g()
declare i32 @__gxx_personality_v0(...)
declare i32 @llvm.eh.typeid.for(i8*) nounwind readnone
declare i8* @__cxa_begin_catch(i8*)
declare void @__cxa_end_catch()
; CHECK: .cfi_personality 0,
; CHECK: .cfi_lsda 0,
; CHECK: @TType Encoding = absptr
; CHECK: @ Call site Encoding = uleb128
; CHECK-PIC: .cfi_personality 155,
; CHECK-PIC: .cfi_lsda 27,
; CHECK-PIC: @TType Encoding = indirect pcrel sdata4
; CHECK-PIC: @ Call site Encoding = uleb128