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llvm-mirror/test/CodeGen/WebAssembly/lower-em-sjlj.ll
Sam Clegg f455e46a69 [WebAssembly] Update WebAssemblyLowerEmscriptenEHSjLj to handle separate compilation 
Previously we were assuming whole program compilation. Now that
separate compilation is a thing we need to update this pass.
Firstly, it can no longer assert on the existence of malloc and free.
This functions might not be in the current translation unit.  If we
need them then we will generate not imports for them.

Secondly the global helper function we create should be marked as
weak since we will be generating a separate copy in each translation
unit.

Finally the names of the symbols used must be unique and fixed since
they need to agree across translation units.

Differential Revision: https://reviews.llvm.org/D49263

llvm-svn: 337301
2018-07-17 16:40:03 +00:00

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; RUN: opt < %s -wasm-lower-em-ehsjlj -S | FileCheck %s
target datalayout = "e-m:e-p:32:32-i64:64-n32:64-S128"
target triple = "wasm32-unknown-unknown"
%struct.__jmp_buf_tag = type { [6 x i32], i32, [32 x i32] }
@global_var = hidden global i32 0, align 4
; CHECK-DAG: __THREW__ = weak_odr global i32 0
; CHECK-DAG: __threwValue = weak_odr global i32 0
; CHECK-DAG: __tempRet0 = weak_odr global i32 0
; Test a simple setjmp - longjmp sequence
define hidden void @setjmp_longjmp() {
; CHECK-LABEL: @setjmp_longjmp
entry:
%buf = alloca [1 x %struct.__jmp_buf_tag], align 16
%arraydecay = getelementptr inbounds [1 x %struct.__jmp_buf_tag], [1 x %struct.__jmp_buf_tag]* %buf, i32 0, i32 0
%call = call i32 @setjmp(%struct.__jmp_buf_tag* %arraydecay) #0
%arraydecay1 = getelementptr inbounds [1 x %struct.__jmp_buf_tag], [1 x %struct.__jmp_buf_tag]* %buf, i32 0, i32 0
call void @longjmp(%struct.__jmp_buf_tag* %arraydecay1, i32 1) #1
unreachable
; CHECK: entry:
; CHECK-NEXT: %[[MALLOCCALL:.*]] = tail call i8* @malloc(i32 40)
; CHECK-NEXT: %[[SETJMP_TABLE:.*]] = bitcast i8* %[[MALLOCCALL]] to i32*
; CHECK-NEXT: store i32 0, i32* %[[SETJMP_TABLE]]
; CHECK-NEXT: %[[SETJMP_TABLE_SIZE:.*]] = add i32 4, 0
; CHECK-NEXT: %[[BUF:.*]] = alloca [1 x %struct.__jmp_buf_tag]
; CHECK-NEXT: %[[ARRAYDECAY:.*]] = getelementptr inbounds [1 x %struct.__jmp_buf_tag], [1 x %struct.__jmp_buf_tag]* %[[BUF]], i32 0, i32 0
; CHECK-NEXT: %[[SETJMP_TABLE1:.*]] = call i32* @saveSetjmp(%struct.__jmp_buf_tag* %[[ARRAYDECAY]], i32 1, i32* %[[SETJMP_TABLE]], i32 %[[SETJMP_TABLE_SIZE]])
; CHECK-NEXT: %[[SETJMP_TABLE_SIZE1:.*]] = load i32, i32* @__tempRet0
; CHECK-NEXT: br label %entry.split
; CHECK: entry.split:
; CHECK-NEXT: phi i32 [ 0, %entry ], [ %[[LONGJMP_RESULT:.*]], %if.end ]
; CHECK-NEXT: %[[ARRAYDECAY1:.*]] = getelementptr inbounds [1 x %struct.__jmp_buf_tag], [1 x %struct.__jmp_buf_tag]* %[[BUF]], i32 0, i32 0
; CHECK-NEXT: store i32 0, i32* @__THREW__
; CHECK-NEXT: call void @"__invoke_void_%struct.__jmp_buf_tag*_i32"(void (%struct.__jmp_buf_tag*, i32)* @emscripten_longjmp_jmpbuf, %struct.__jmp_buf_tag* %[[ARRAYDECAY1]], i32 1)
; CHECK-NEXT: %[[__THREW__VAL:.*]] = load i32, i32* @__THREW__
; CHECK-NEXT: store i32 0, i32* @__THREW__
; CHECK-NEXT: %[[CMP0:.*]] = icmp ne i32 %__THREW__.val, 0
; CHECK-NEXT: %[[THREWVALUE_VAL:.*]] = load i32, i32* @__threwValue
; CHECK-NEXT: %[[CMP1:.*]] = icmp ne i32 %[[THREWVALUE_VAL]], 0
; CHECK-NEXT: %[[CMP:.*]] = and i1 %[[CMP0]], %[[CMP1]]
; CHECK-NEXT: br i1 %[[CMP]], label %if.then1, label %if.else1
; CHECK: entry.split.split:
; CHECK-NEXT: unreachable
; CHECK: if.then1:
; CHECK-NEXT: %[[__THREW__VAL_I32P:.*]] = inttoptr i32 %[[__THREW__VAL]] to i32*
; CHECK-NEXT: %[[__THREW__VAL_I32P_LOADED:.*]] = load i32, i32* %[[__THREW__VAL_I32P]]
; CHECK-NEXT: %[[LABEL:.*]] = call i32 @testSetjmp(i32 %[[__THREW__VAL_I32P_LOADED]], i32* %[[SETJMP_TABLE1]], i32 %[[SETJMP_TABLE_SIZE1]])
; CHECK-NEXT: %[[CMP:.*]] = icmp eq i32 %[[LABEL]], 0
; CHECK-NEXT: br i1 %[[CMP]], label %if.then2, label %if.end2
; CHECK: if.else1:
; CHECK-NEXT: br label %if.end
; CHECK: if.end:
; CHECK-NEXT: %[[LABEL_PHI:.*]] = phi i32 [ %[[LABEL:.*]], %if.end2 ], [ -1, %if.else1 ]
; CHECK-NEXT: %[[LONGJMP_RESULT]] = load i32, i32* @__tempRet0
; CHECK-NEXT: switch i32 %[[LABEL_PHI]], label %entry.split.split [
; CHECK-NEXT: i32 1, label %entry.split
; CHECK-NEXT: ]
; CHECK: if.then2:
; CHECK-NEXT: call void @emscripten_longjmp(i32 %[[__THREW__VAL]], i32 %[[THREWVALUE_VAL]])
; CHECK-NEXT: unreachable
; CHECK: if.end2:
; CHECK-NEXT: store i32 %[[THREWVALUE_VAL]], i32* @__tempRet0
; CHECK-NEXT: br label %if.end
}
; Test a case of a function call (which is not longjmp) after a setjmp
define hidden void @setjmp_other() {
; CHECK-LABEL: @setjmp_other
entry:
%buf = alloca [1 x %struct.__jmp_buf_tag], align 16
%arraydecay = getelementptr inbounds [1 x %struct.__jmp_buf_tag], [1 x %struct.__jmp_buf_tag]* %buf, i32 0, i32 0
%call = call i32 @setjmp(%struct.__jmp_buf_tag* %arraydecay) #0
call void @foo()
ret void
; CHECK: entry:
; CHECK: %[[SETJMP_TABLE:.*]] = call i32* @saveSetjmp(
; CHECK: entry.split:
; CHECK: call void @__invoke_void(void ()* @foo)
; CHECK: entry.split.split:
; CHECK-NEXT: %[[BUF:.*]] = bitcast i32* %[[SETJMP_TABLE]] to i8*
; CHECK-NEXT: tail call void @free(i8* %[[BUF]])
; CHECK-NEXT: ret void
}
; Test a case when a function call is within try-catch, after a setjmp
define hidden void @exception_and_longjmp() #3 personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*) {
; CHECK-LABEL: @exception_and_longjmp
entry:
%buf = alloca [1 x %struct.__jmp_buf_tag], align 16
%arraydecay = getelementptr inbounds [1 x %struct.__jmp_buf_tag], [1 x %struct.__jmp_buf_tag]* %buf, i32 0, i32 0
%call = call i32 @setjmp(%struct.__jmp_buf_tag* %arraydecay) #0
invoke void @foo()
to label %try.cont unwind label %lpad
; CHECK: entry.split:
; CHECK: store i32 0, i32* @__THREW__
; CHECK-NEXT: call void @__invoke_void(void ()* @foo)
; CHECK-NEXT: %[[__THREW__VAL:.*]] = load i32, i32* @__THREW__
; CHECK-NEXT: store i32 0, i32* @__THREW__
; CHECK-NEXT: %[[CMP0:.*]] = icmp ne i32 %[[__THREW__VAL]], 0
; CHECK-NEXT: %[[THREWVALUE_VAL:.*]] = load i32, i32* @__threwValue
; CHECK-NEXT: %[[CMP1:.*]] = icmp ne i32 %[[THREWVALUE_VAL]], 0
; CHECK-NEXT: %[[CMP:.*]] = and i1 %[[CMP0]], %[[CMP1]]
; CHECK-NEXT: br i1 %[[CMP]], label %if.then1, label %if.else1
; CHECK: entry.split.split:
; CHECK-NEXT: %[[CMP:.*]] = icmp eq i32 %[[__THREW__VAL]], 1
; CHECK-NEXT: br i1 %[[CMP]], label %lpad, label %try.cont
lpad: ; preds = %entry
%0 = landingpad { i8*, i32 }
catch i8* null
%1 = extractvalue { i8*, i32 } %0, 0
%2 = extractvalue { i8*, i32 } %0, 1
%3 = call i8* @__cxa_begin_catch(i8* %1) #2
call void @__cxa_end_catch()
br label %try.cont
try.cont: ; preds = %entry, %lpad
ret void
}
; Test SSA validity
define hidden void @ssa(i32 %n) {
; CHECK-LABEL: @ssa
entry:
%buf = alloca [1 x %struct.__jmp_buf_tag], align 16
%cmp = icmp sgt i32 %n, 5
br i1 %cmp, label %if.then, label %if.end
; CHECK: entry:
; CHECK: %[[SETJMP_TABLE0:.*]] = bitcast i8*
; CHECK: %[[SETJMP_TABLE_SIZE0:.*]] = add i32 4, 0
if.then: ; preds = %entry
%0 = load i32, i32* @global_var, align 4
%arraydecay = getelementptr inbounds [1 x %struct.__jmp_buf_tag], [1 x %struct.__jmp_buf_tag]* %buf, i32 0, i32 0
%call = call i32 @setjmp(%struct.__jmp_buf_tag* %arraydecay) #0
store i32 %0, i32* @global_var, align 4
br label %if.end
; CHECK: if.then:
; CHECK: %[[VAR0:.*]] = load i32, i32* @global_var, align 4
; CHECK: %[[SETJMP_TABLE1:.*]] = call i32* @saveSetjmp(
; CHECK-NEXT: %[[SETJMP_TABLE_SIZE1:.*]] = load i32, i32* @__tempRet0
; CHECK: if.then.split:
; CHECK: %[[VAR1:.*]] = phi i32 [ %[[VAR0]], %if.then ], [ %[[VAR2:.*]], %if.end3 ]
; CHECK: %[[SETJMP_TABLE_SIZE2:.*]] = phi i32 [ %[[SETJMP_TABLE_SIZE1]], %if.then ], [ %[[SETJMP_TABLE_SIZE3:.*]], %if.end3 ]
; CHECK: %[[SETJMP_TABLE2:.*]] = phi i32* [ %[[SETJMP_TABLE1]], %if.then ], [ %[[SETJMP_TABLE3:.*]], %if.end3 ]
; CHECK: store i32 %[[VAR1]], i32* @global_var, align 4
if.end: ; preds = %if.then, %entry
%arraydecay1 = getelementptr inbounds [1 x %struct.__jmp_buf_tag], [1 x %struct.__jmp_buf_tag]* %buf, i32 0, i32 0
call void @longjmp(%struct.__jmp_buf_tag* %arraydecay1, i32 5) #1
unreachable
; CHECK: if.end:
; CHECK: %[[VAR2]] = phi i32 [ %[[VAR1]], %if.then.split ], [ undef, %entry ]
; CHECK: %[[SETJMP_TABLE_SIZE3]] = phi i32 [ %[[SETJMP_TABLE_SIZE2]], %if.then.split ], [ %[[SETJMP_TABLE_SIZE0]], %entry ]
; CHECK: %[[SETJMP_TABLE3]] = phi i32* [ %[[SETJMP_TABLE2]], %if.then.split ], [ %[[SETJMP_TABLE0]], %entry ]
}
; Test a case when a function only calls other functions that are neither setjmp nor longjmp
define hidden void @only_other_func() {
entry:
call void @foo()
ret void
; CHECK: call void @foo()
}
; Test a case when a function only calls longjmp and not setjmp
define hidden void @only_longjmp() {
entry:
%buf = alloca [1 x %struct.__jmp_buf_tag], align 16
%arraydecay = getelementptr inbounds [1 x %struct.__jmp_buf_tag], [1 x %struct.__jmp_buf_tag]* %buf, i32 0, i32 0
call void @longjmp(%struct.__jmp_buf_tag* %arraydecay, i32 5) #1
unreachable
; CHECK: %[[ARRAYDECAY:.*]] = getelementptr inbounds
; CHECK-NEXT: call void @emscripten_longjmp_jmpbuf(%struct.__jmp_buf_tag* %[[ARRAYDECAY]], i32 5) #1
}
declare void @foo()
; Function Attrs: returns_twice
declare i32 @setjmp(%struct.__jmp_buf_tag*) #0
; Function Attrs: noreturn
declare void @longjmp(%struct.__jmp_buf_tag*, i32) #1
declare i32 @__gxx_personality_v0(...)
declare i8* @__cxa_begin_catch(i8*)
declare void @__cxa_end_catch()
declare i8* @malloc(i32)
declare void @free(i8*)
; JS glue functions and invoke wrappers declaration
; CHECK-DAG: declare i32* @saveSetjmp(%struct.__jmp_buf_tag*, i32, i32*, i32)
; CHECK-DAG: declare i32 @testSetjmp(i32, i32*, i32)
; CHECK-DAG: declare void @emscripten_longjmp_jmpbuf(%struct.__jmp_buf_tag*, i32)
; CHECK-DAG: declare void @emscripten_longjmp(i32, i32)
; CHECK-DAG: declare void @__invoke_void(void ()*)
; CHECK-DAG: declare void @"__invoke_void_%struct.__jmp_buf_tag*_i32"(void (%struct.__jmp_buf_tag*, i32)*, %struct.__jmp_buf_tag*, i32)
attributes #0 = { returns_twice }
attributes #1 = { noreturn }
attributes #2 = { nounwind }
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