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