2019-01-18 04:24:14 +08:00
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; RUN: llc -o - %s -verify-machineinstrs -mtriple=aarch64-windows | FileCheck %s
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2019-01-17 08:24:38 +08:00
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; Windows runtime passes the establisher frame as the second argument to the
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; termination handler. Check that we copy it into fp.
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; CHECK: ?dtor$3@?0?main@4HA":
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; CHECK: .seh_proc "?dtor$3@?0?main@4HA"
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; CHECK: stp x29, x30, [sp, #-16]! ; 16-byte Folded Spill
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[AArch64] Generate and parse SEH assembly directives
This ensures that you get the same output regardless if generating
code directly to an object file or if generating assembly and
assembling that.
Add implementations of the EmitARM64WinCFI*() methods in
AArch64TargetAsmStreamer, and fill in one blank in MCAsmStreamer.
Add corresponding directive handlers in AArch64AsmParser and
COFFAsmParser.
Some SEH directive names have been picked to match the prior art
for SEH assembly directives for x86_64, e.g. the spelling of
".seh_startepilogue" matching the preexisting ".seh_endprologue".
For the directives for saving registers, the exact spelling
from the arm64 documentation is picked, e.g. ".seh_save_reg" (to follow
that naming for all the other ones, e.g. ".seh_save_fregp_x"), while
the corresponding one for x86_64 is plain ".seh_savereg" without the
second underscore.
Directives in the epilogues have the same names as in prologues,
e.g. .seh_savereg, even though the registers are restored, not
saved, at that point.
Differential Revision: https://reviews.llvm.org/D86529
2020-08-07 17:44:48 +08:00
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; CHECK-NEXT: .seh_save_fplr_x 16
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; CHECK-NEXT: .seh_endprologue
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2019-01-17 08:24:38 +08:00
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; CHECK-NEXT: mov x29, x1
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target datalayout = "e-m:w-p:64:64-i32:32-i64:64-i128:128-n32:64-S128"
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target triple = "aarch64-unknown-windows-msvc19.15.26732"
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; Function Attrs: noinline nounwind optnone uwtable
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define dso_local i32 @main() #0 personality i8* bitcast (i32 (...)* @__C_specific_handler to i8*) {
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entry:
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%retval = alloca i32, align 4
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%Counter = alloca i32, align 4
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%__exception_code = alloca i32, align 4
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call void (...) @llvm.localescape(i32* %Counter)
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store i32 0, i32* %retval, align 4
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store i32 0, i32* %Counter, align 4
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%call = invoke i32 bitcast (i32 (...)* @RaiseStatus to i32 (i32)*)(i32 -1073741675) #3
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to label %invoke.cont unwind label %ehcleanup
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invoke.cont: ; preds = %entry
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%0 = call i8* @llvm.localaddress()
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invoke void @"?fin$0@0@main@@"(i8 0, i8* %0) #3
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to label %invoke.cont1 unwind label %catch.dispatch
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invoke.cont1: ; preds = %invoke.cont
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br label %__try.cont
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ehcleanup: ; preds = %entry
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%1 = cleanuppad within none []
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%2 = call i8* @llvm.localaddress()
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invoke void @"?fin$0@0@main@@"(i8 1, i8* %2) #3 [ "funclet"(token %1) ]
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to label %invoke.cont2 unwind label %catch.dispatch
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invoke.cont2: ; preds = %ehcleanup
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cleanupret from %1 unwind label %catch.dispatch
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catch.dispatch: ; preds = %invoke.cont2, %ehcleanup, %invoke.cont
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%3 = catchswitch within none [label %__except] unwind to caller
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__except: ; preds = %catch.dispatch
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%4 = catchpad within %3 [i8* null]
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catchret from %4 to label %__except3
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__except3: ; preds = %__except
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%5 = call i32 @llvm.eh.exceptioncode(token %4)
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store i32 %5, i32* %__exception_code, align 4
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%6 = load i32, i32* %Counter, align 4
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%add = add nsw i32 %6, 5
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store i32 %add, i32* %Counter, align 4
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br label %__try.cont
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__try.cont: ; preds = %__except3, %invoke.cont1
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%7 = load i32, i32* %retval, align 4
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ret i32 %7
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}
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define internal void @"?fin$0@0@main@@"(i8 %abnormal_termination, i8* %frame_pointer) {
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entry:
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%frame_pointer.addr = alloca i8*, align 8
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%abnormal_termination.addr = alloca i8, align 1
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%0 = call i8* @llvm.localrecover(i8* bitcast (i32 ()* @main to i8*), i8* %frame_pointer, i32 0)
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%Counter = bitcast i8* %0 to i32*
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store i8* %frame_pointer, i8** %frame_pointer.addr, align 8
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store i8 %abnormal_termination, i8* %abnormal_termination.addr, align 1
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store i32 3, i32* %Counter, align 4
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call void @"?fin$1@0@main@@"(i8 0, i8* %frame_pointer)
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%1 = load i32, i32* %Counter, align 4
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%add = add nsw i32 %1, 2
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store i32 %add, i32* %Counter, align 4
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%call = call i32 bitcast (i32 (...)* @RaiseStatus to i32 (i32)*)(i32 -1073741675)
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ret void
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}
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; Function Attrs: nounwind readnone
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declare i8* @llvm.localrecover(i8*, i8*, i32) #1
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define internal void @"?fin$1@0@main@@"(i8 %abnormal_termination, i8* %frame_pointer) {
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entry:
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%frame_pointer.addr = alloca i8*, align 8
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%abnormal_termination.addr = alloca i8, align 1
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%0 = call i8* @llvm.localrecover(i8* bitcast (i32 ()* @main to i8*), i8* %frame_pointer, i32 0)
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%Counter = bitcast i8* %0 to i32*
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store i8* %frame_pointer, i8** %frame_pointer.addr, align 8
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store i8 %abnormal_termination, i8* %abnormal_termination.addr, align 1
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%1 = load i32, i32* %Counter, align 4
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%cmp = icmp eq i32 %1, 3
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br i1 %cmp, label %if.then, label %if.end
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if.then: ; preds = %entry
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%2 = load i32, i32* %Counter, align 4
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%add = add nsw i32 %2, 1
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store i32 %add, i32* %Counter, align 4
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br label %if.end
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if.end: ; preds = %if.then, %entry
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ret void
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}
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declare dso_local i32 @RaiseStatus(...)
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declare dso_local i32 @__C_specific_handler(...)
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; Function Attrs: nounwind readnone
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declare i8* @llvm.localaddress() #1
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; Function Attrs: nounwind readnone
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declare i32 @llvm.eh.exceptioncode(token) #1
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; Function Attrs: nounwind
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declare void @llvm.localescape(...) #2
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attributes #0 = { noinline nounwind optnone uwtable }
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attributes #1 = { nounwind readnone }
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attributes #2 = { nounwind }
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attributes #3 = { noinline }
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