mixed-catch.ll
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; RUN: opt -lcssa -S < %s | FileCheck %s
; RUN: opt -passes=lcssa -S < %s | FileCheck %s
; This test is based on the following C++ code:
;
; void f()
; {
; for (int i=0; i<12; i++) {
; try {
; if (i==3)
; throw i;
; } catch (int) {
; continue;
; } catch (...) { }
; if (i==3) break;
; }
; }
;
; The loop info analysis identifies the catch pad for the second catch as being
; outside the loop (because it returns to %for.end) but the associated
; catchswitch block is identified as being inside the loop. Because of this
; analysis, the LCSSA pass wants to create a PHI node in the catchpad block
; for the catchswitch value, but this is a token, so it can't.
define void @f() personality i8* bitcast (i32 (...)* @__CxxFrameHandler3 to i8*) {
entry:
%tmp = alloca i32, align 4
%i7 = alloca i32, align 4
br label %for.cond
for.cond: ; preds = %for.inc, %entry
%i.0 = phi i32 [ 0, %entry ], [ %inc, %for.inc ]
%cmp = icmp slt i32 %i.0, 12
br i1 %cmp, label %for.body, label %for.end
for.body: ; preds = %for.cond
%cond = icmp eq i32 %i.0, 3
br i1 %cond, label %if.then, label %for.inc
if.then: ; preds = %for.body
store i32 %i.0, i32* %tmp, align 4
%tmp1 = bitcast i32* %tmp to i8*
invoke void @_CxxThrowException(i8* %tmp1, %eh.ThrowInfo* nonnull @_TI1H) #1
to label %unreachable unwind label %catch.dispatch
catch.dispatch: ; preds = %if.then
%tmp2 = catchswitch within none [label %catch, label %catch2] unwind to caller
catch: ; preds = %catch.dispatch
%tmp3 = catchpad within %tmp2 [%rtti.TypeDescriptor2* @"\01??_R0H@8", i32 0, i32* %i7]
catchret from %tmp3 to label %for.inc
catch2: ; preds = %catch.dispatch
%tmp4 = catchpad within %tmp2 [i8* null, i32 64, i8* null]
catchret from %tmp4 to label %for.end
for.inc: ; preds = %catch, %for.body
%inc = add nsw i32 %i.0, 1
br label %for.cond
for.end: ; preds = %catch2, %for.cond
ret void
unreachable: ; preds = %if.then
unreachable
}
; CHECK-LABEL: define void @f()
; CHECK: catch2:
; CHECK-NOT: phi
; CHECK: %tmp4 = catchpad within %tmp2
; CHECK: catchret from %tmp4 to label %for.end
%rtti.TypeDescriptor2 = type { i8**, i8*, [3 x i8] }
%eh.CatchableType = type { i32, i32, i32, i32, i32, i32, i32 }
%eh.CatchableTypeArray.1 = type { i32, [1 x i32] }
%eh.ThrowInfo = type { i32, i32, i32, i32 }
$"\01??_R0H@8" = comdat any
$"_CT??_R0H@84" = comdat any
$_CTA1H = comdat any
$_TI1H = comdat any
@"\01??_7type_info@@6B@" = external constant i8*
@"\01??_R0H@8" = linkonce_odr global %rtti.TypeDescriptor2 { i8** @"\01??_7type_info@@6B@", i8* null, [3 x i8] c".H\00" }, comdat
@__ImageBase = external constant i8
@"_CT??_R0H@84" = linkonce_odr unnamed_addr constant %eh.CatchableType { i32 1, i32 trunc (i64 sub nuw nsw (i64 ptrtoint (%rtti.TypeDescriptor2* @"\01??_R0H@8" to i64), i64 ptrtoint (i8* @__ImageBase to i64)) to i32), i32 0, i32 -1, i32 0, i32 4, i32 0 }, section ".xdata", comdat
@_CTA1H = linkonce_odr unnamed_addr constant %eh.CatchableTypeArray.1 { i32 1, [1 x i32] [i32 trunc (i64 sub nuw nsw (i64 ptrtoint (%eh.CatchableType* @"_CT??_R0H@84" to i64), i64 ptrtoint (i8* @__ImageBase to i64)) to i32)] }, section ".xdata", comdat
@_TI1H = linkonce_odr unnamed_addr constant %eh.ThrowInfo { i32 0, i32 0, i32 0, i32 trunc (i64 sub nuw nsw (i64 ptrtoint (%eh.CatchableTypeArray.1* @_CTA1H to i64), i64 ptrtoint (i8* @__ImageBase to i64)) to i32) }, section ".xdata", comdat
declare void @_CxxThrowException(i8*, %eh.ThrowInfo*)
declare i32 @__CxxFrameHandler3(...)