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[NFC][SimplifyCFG] Add a test showing invoke->call simplification failure

This commit is contained in:
Roman Lebedev 2020-08-08 16:53:30 +03:00
parent a587bf3eb0
commit c2ebb32465
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1 changed files with 107 additions and 0 deletions
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llvm/test/Transforms/SimplifyCFG/invoke_unwind_lifetime.ll Normal file
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -simplifycfg -S | FileCheck %s
declare void @llvm.lifetime.start.p0i8(i64, i8*)
declare void @llvm.lifetime.end.p0i8(i64, i8*)
declare void @escape(i32*)
declare void @throwing_callee_foo()
declare void @throwing_callee_bar()
declare i32 @__gxx_personality_v0(...)
define void @caller(i1 %c) personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*) {
; CHECK-LABEL: @caller(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[I0:%.*]] = alloca i32, align 4
; CHECK-NEXT: [[I1:%.*]] = bitcast i32* [[I0]] to i8*
; CHECK-NEXT: call void @llvm.lifetime.start.p0i8(i64 4, i8* nonnull [[I1]])
; CHECK-NEXT: call void @escape(i32* [[I0]])
; CHECK-NEXT: [[I2:%.*]] = alloca i32, align 4
; CHECK-NEXT: [[I3:%.*]] = bitcast i32* [[I2]] to i8*
; CHECK-NEXT: call void @llvm.lifetime.start.p0i8(i64 4, i8* nonnull [[I3]])
; CHECK-NEXT: call void @escape(i32* [[I2]])
; CHECK-NEXT: [[I4:%.*]] = alloca i32, align 4
; CHECK-NEXT: [[I5:%.*]] = bitcast i32* [[I4]] to i8*
; CHECK-NEXT: call void @llvm.lifetime.start.p0i8(i64 4, i8* nonnull [[I5]])
; CHECK-NEXT: call void @escape(i32* [[I4]])
; CHECK-NEXT: [[I6:%.*]] = alloca i32, align 4
; CHECK-NEXT: [[I7:%.*]] = bitcast i32* [[I6]] to i8*
; CHECK-NEXT: call void @llvm.lifetime.start.p0i8(i64 4, i8* nonnull [[I7]])
; CHECK-NEXT: call void @escape(i32* [[I6]])
; CHECK-NEXT: br i1 [[C:%.*]], label [[V0:%.*]], label [[V1:%.*]]
; CHECK: v0:
; CHECK-NEXT: invoke void @throwing_callee_foo()
; CHECK-NEXT: to label [[INVOKE_CONT:%.*]] unwind label [[LPAD_V0:%.*]]
; CHECK: v1:
; CHECK-NEXT: invoke void @throwing_callee_bar()
; CHECK-NEXT: to label [[INVOKE_CONT]] unwind label [[LPAD_V1:%.*]]
; CHECK: invoke.cont:
; CHECK-NEXT: unreachable
; CHECK: lpad.v0:
; CHECK-NEXT: [[I8:%.*]] = landingpad { i8*, i32 }
; CHECK-NEXT: cleanup
; CHECK-NEXT: call void @llvm.lifetime.end.p0i8(i64 4, i8* nonnull [[I1]])
; CHECK-NEXT: br label [[END:%.*]]
; CHECK: lpad.v1:
; CHECK-NEXT: [[I9:%.*]] = landingpad { i8*, i32 }
; CHECK-NEXT: cleanup
; CHECK-NEXT: call void @llvm.lifetime.end.p0i8(i64 4, i8* nonnull [[I3]])
; CHECK-NEXT: br label [[END]]
; CHECK: end:
; CHECK-NEXT: [[I10:%.*]] = phi { i8*, i32 } [ [[I8]], [[LPAD_V0]] ], [ [[I9]], [[LPAD_V1]] ]
; CHECK-NEXT: [[I11:%.*]] = phi i8* [ [[I5]], [[LPAD_V0]] ], [ [[I7]], [[LPAD_V1]] ]
; CHECK-NEXT: call void @llvm.lifetime.end.p0i8(i64 4, i8* nonnull [[I11]])
; CHECK-NEXT: resume { i8*, i32 } [[I10]]
;
entry:
%i0 = alloca i32
%i1 = bitcast i32* %i0 to i8*
call void @llvm.lifetime.start.p0i8(i64 4, i8* nonnull %i1)
call void @escape(i32* %i0)
%i2 = alloca i32
%i3 = bitcast i32* %i2 to i8*
call void @llvm.lifetime.start.p0i8(i64 4, i8* nonnull %i3)
call void @escape(i32* %i2)
%i4 = alloca i32
%i5 = bitcast i32* %i4 to i8*
call void @llvm.lifetime.start.p0i8(i64 4, i8* nonnull %i5)
call void @escape(i32* %i4)
%i6 = alloca i32
%i7 = bitcast i32* %i6 to i8*
call void @llvm.lifetime.start.p0i8(i64 4, i8* nonnull %i7)
call void @escape(i32* %i6)
br i1 %c, label %v0, label %v1
v0:
invoke void @throwing_callee_foo()
to label %invoke.cont unwind label %lpad.v0
v1:
invoke void @throwing_callee_bar()
to label %invoke.cont unwind label %lpad.v1
invoke.cont:
unreachable
lpad.v0:
%i8 = landingpad { i8*, i32 } cleanup
call void @llvm.lifetime.end.p0i8(i64 4, i8* nonnull %i1)
br label %end
lpad.v1:
%i9 = landingpad { i8*, i32 } cleanup
call void @llvm.lifetime.end.p0i8(i64 4, i8* nonnull %i3)
br label %end
end:
%i10 = phi { i8*, i32 } [ %i8, %lpad.v0 ], [ %i9, %lpad.v1 ]
%i11 = phi i8* [ %i5, %lpad.v0 ], [ %i7, %lpad.v1 ]
call void @llvm.lifetime.end.p0i8(i64 4, i8* nonnull %i11)
resume { i8*, i32 } %i10
}