forked from OSchip/llvm-project
325 lines
13 KiB
LLVM
325 lines
13 KiB
LLVM
; RUN: opt < %s -wasm-lower-em-ehsjlj -S | FileCheck %s
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target datalayout = "e-m:e-p:32:32-i64:64-n32:64-S128"
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target triple = "wasm32-unknown-unknown"
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%struct.__jmp_buf_tag = type { [6 x i32], i32, [32 x i32] }
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@global_var = global i32 0, align 4
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; CHECK-DAG: __THREW__ = external global i32
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; CHECK-DAG: __threwValue = external global i32
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; Test a simple setjmp - longjmp sequence
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define void @setjmp_longjmp() {
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; CHECK-LABEL: @setjmp_longjmp
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entry:
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%buf = alloca [1 x %struct.__jmp_buf_tag], align 16
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%arraydecay = getelementptr inbounds [1 x %struct.__jmp_buf_tag], [1 x %struct.__jmp_buf_tag]* %buf, i32 0, i32 0
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%call = call i32 @setjmp(%struct.__jmp_buf_tag* %arraydecay) #0
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%arraydecay1 = getelementptr inbounds [1 x %struct.__jmp_buf_tag], [1 x %struct.__jmp_buf_tag]* %buf, i32 0, i32 0
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call void @longjmp(%struct.__jmp_buf_tag* %arraydecay1, i32 1) #1
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unreachable
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; CHECK: entry:
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; CHECK-NEXT: %[[MALLOCCALL:.*]] = tail call i8* @malloc(i32 40)
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; CHECK-NEXT: %[[SETJMP_TABLE:.*]] = bitcast i8* %[[MALLOCCALL]] to i32*
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; CHECK-NEXT: store i32 0, i32* %[[SETJMP_TABLE]]
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; CHECK-NEXT: %[[SETJMP_TABLE_SIZE:.*]] = add i32 4, 0
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; CHECK-NEXT: %[[BUF:.*]] = alloca [1 x %struct.__jmp_buf_tag]
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; CHECK-NEXT: %[[ARRAYDECAY:.*]] = getelementptr inbounds [1 x %struct.__jmp_buf_tag], [1 x %struct.__jmp_buf_tag]* %[[BUF]], i32 0, i32 0
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; CHECK-NEXT: %[[SETJMP_TABLE1:.*]] = call i32* @saveSetjmp(%struct.__jmp_buf_tag* %[[ARRAYDECAY]], i32 1, i32* %[[SETJMP_TABLE]], i32 %[[SETJMP_TABLE_SIZE]])
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; CHECK-NEXT: %[[SETJMP_TABLE_SIZE1:.*]] = call i32 @getTempRet0()
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; CHECK-NEXT: br label %entry.split
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; CHECK: entry.split:
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; CHECK-NEXT: phi i32 [ 0, %entry ], [ %[[LONGJMP_RESULT:.*]], %if.end ]
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; CHECK-NEXT: %[[ARRAYDECAY1:.*]] = getelementptr inbounds [1 x %struct.__jmp_buf_tag], [1 x %struct.__jmp_buf_tag]* %[[BUF]], i32 0, i32 0
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; CHECK-NEXT: store i32 0, i32* @__THREW__
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; CHECK-NEXT: call cc{{.*}} void @"__invoke_void_%struct.__jmp_buf_tag*_i32"(void (%struct.__jmp_buf_tag*, i32)* @emscripten_longjmp_jmpbuf, %struct.__jmp_buf_tag* %[[ARRAYDECAY1]], i32 1)
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; CHECK-NEXT: %[[__THREW__VAL:.*]] = load i32, i32* @__THREW__
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; CHECK-NEXT: store i32 0, i32* @__THREW__
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; CHECK-NEXT: %[[CMP0:.*]] = icmp ne i32 %__THREW__.val, 0
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; CHECK-NEXT: %[[THREWVALUE_VAL:.*]] = load i32, i32* @__threwValue
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; CHECK-NEXT: %[[CMP1:.*]] = icmp ne i32 %[[THREWVALUE_VAL]], 0
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; CHECK-NEXT: %[[CMP:.*]] = and i1 %[[CMP0]], %[[CMP1]]
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; CHECK-NEXT: br i1 %[[CMP]], label %if.then1, label %if.else1
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; CHECK: entry.split.split:
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; CHECK-NEXT: unreachable
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; CHECK: if.then1:
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; CHECK-NEXT: %[[__THREW__VAL_I32P:.*]] = inttoptr i32 %[[__THREW__VAL]] to i32*
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; CHECK-NEXT: %[[__THREW__VAL_I32P_LOADED:.*]] = load i32, i32* %[[__THREW__VAL_I32P]]
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; CHECK-NEXT: %[[LABEL:.*]] = call i32 @testSetjmp(i32 %[[__THREW__VAL_I32P_LOADED]], i32* %[[SETJMP_TABLE1]], i32 %[[SETJMP_TABLE_SIZE1]])
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; CHECK-NEXT: %[[CMP:.*]] = icmp eq i32 %[[LABEL]], 0
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; CHECK-NEXT: br i1 %[[CMP]], label %if.then2, label %if.end2
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; CHECK: if.else1:
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; CHECK-NEXT: br label %if.end
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; CHECK: if.end:
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; CHECK-NEXT: %[[LABEL_PHI:.*]] = phi i32 [ %[[LABEL:.*]], %if.end2 ], [ -1, %if.else1 ]
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; CHECK-NEXT: %[[LONGJMP_RESULT]] = call i32 @getTempRet0()
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; CHECK-NEXT: switch i32 %[[LABEL_PHI]], label %entry.split.split [
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; CHECK-NEXT: i32 1, label %entry.split
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; CHECK-NEXT: ]
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; CHECK: if.then2:
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; CHECK-NEXT: call void @emscripten_longjmp(i32 %[[__THREW__VAL]], i32 %[[THREWVALUE_VAL]])
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; CHECK-NEXT: unreachable
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; CHECK: if.end2:
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; CHECK-NEXT: call void @setTempRet0(i32 %[[THREWVALUE_VAL]])
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; CHECK-NEXT: br label %if.end
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}
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; Test a case of a function call (which is not longjmp) after a setjmp
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define void @setjmp_other() {
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; CHECK-LABEL: @setjmp_other
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entry:
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%buf = alloca [1 x %struct.__jmp_buf_tag], align 16
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%arraydecay = getelementptr inbounds [1 x %struct.__jmp_buf_tag], [1 x %struct.__jmp_buf_tag]* %buf, i32 0, i32 0
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%call = call i32 @setjmp(%struct.__jmp_buf_tag* %arraydecay) #0
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call void @foo()
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ret void
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; CHECK: entry:
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; CHECK: %[[SETJMP_TABLE:.*]] = call i32* @saveSetjmp(
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; CHECK: entry.split:
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; CHECK: @__invoke_void(void ()* @foo)
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; CHECK: entry.split.split:
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; CHECK-NEXT: %[[BUF:.*]] = bitcast i32* %[[SETJMP_TABLE]] to i8*
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; CHECK-NEXT: tail call void @free(i8* %[[BUF]])
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; CHECK-NEXT: ret void
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}
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; Test a case when a function call is within try-catch, after a setjmp
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define void @exception_and_longjmp() personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*) {
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; CHECK-LABEL: @exception_and_longjmp
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entry:
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%buf = alloca [1 x %struct.__jmp_buf_tag], align 16
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%arraydecay = getelementptr inbounds [1 x %struct.__jmp_buf_tag], [1 x %struct.__jmp_buf_tag]* %buf, i32 0, i32 0
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%call = call i32 @setjmp(%struct.__jmp_buf_tag* %arraydecay) #0
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invoke void @foo()
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to label %try.cont unwind label %lpad
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; CHECK: entry.split:
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; CHECK: store i32 0, i32* @__THREW__
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; CHECK-NEXT: call cc{{.*}} void @__invoke_void(void ()* @foo)
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; CHECK-NEXT: %[[__THREW__VAL:.*]] = load i32, i32* @__THREW__
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; CHECK-NEXT: store i32 0, i32* @__THREW__
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; CHECK-NEXT: %[[CMP0:.*]] = icmp ne i32 %[[__THREW__VAL]], 0
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; CHECK-NEXT: %[[THREWVALUE_VAL:.*]] = load i32, i32* @__threwValue
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; CHECK-NEXT: %[[CMP1:.*]] = icmp ne i32 %[[THREWVALUE_VAL]], 0
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; CHECK-NEXT: %[[CMP:.*]] = and i1 %[[CMP0]], %[[CMP1]]
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; CHECK-NEXT: br i1 %[[CMP]], label %if.then1, label %if.else1
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; CHECK: entry.split.split:
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; CHECK-NEXT: %[[CMP:.*]] = icmp eq i32 %[[__THREW__VAL]], 1
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; CHECK-NEXT: br i1 %[[CMP]], label %lpad, label %try.cont
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lpad: ; preds = %entry
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%0 = landingpad { i8*, i32 }
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catch i8* null
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%1 = extractvalue { i8*, i32 } %0, 0
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%2 = extractvalue { i8*, i32 } %0, 1
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%3 = call i8* @__cxa_begin_catch(i8* %1) #2
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call void @__cxa_end_catch()
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br label %try.cont
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try.cont: ; preds = %entry, %lpad
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ret void
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}
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; Test SSA validity
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define void @ssa(i32 %n) {
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; CHECK-LABEL: @ssa
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entry:
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%buf = alloca [1 x %struct.__jmp_buf_tag], align 16
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%cmp = icmp sgt i32 %n, 5
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br i1 %cmp, label %if.then, label %if.end
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; CHECK: entry:
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; CHECK: %[[SETJMP_TABLE0:.*]] = bitcast i8*
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; CHECK: %[[SETJMP_TABLE_SIZE0:.*]] = add i32 4, 0
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if.then: ; preds = %entry
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%0 = load i32, i32* @global_var, align 4
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%arraydecay = getelementptr inbounds [1 x %struct.__jmp_buf_tag], [1 x %struct.__jmp_buf_tag]* %buf, i32 0, i32 0
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%call = call i32 @setjmp(%struct.__jmp_buf_tag* %arraydecay) #0
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store i32 %0, i32* @global_var, align 4
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br label %if.end
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; CHECK: if.then:
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; CHECK: %[[VAR0:.*]] = load i32, i32* @global_var, align 4
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; CHECK: %[[SETJMP_TABLE1:.*]] = call i32* @saveSetjmp(
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; CHECK-NEXT: %[[SETJMP_TABLE_SIZE1:.*]] = call i32 @getTempRet0()
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; CHECK: if.then.split:
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; CHECK: %[[VAR1:.*]] = phi i32 [ %[[VAR0]], %if.then ], [ %[[VAR2:.*]], %if.end3 ]
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; CHECK: %[[SETJMP_TABLE_SIZE2:.*]] = phi i32 [ %[[SETJMP_TABLE_SIZE1]], %if.then ], [ %[[SETJMP_TABLE_SIZE3:.*]], %if.end3 ]
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; CHECK: %[[SETJMP_TABLE2:.*]] = phi i32* [ %[[SETJMP_TABLE1]], %if.then ], [ %[[SETJMP_TABLE3:.*]], %if.end3 ]
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; CHECK: store i32 %[[VAR1]], i32* @global_var, align 4
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if.end: ; preds = %if.then, %entry
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%arraydecay1 = getelementptr inbounds [1 x %struct.__jmp_buf_tag], [1 x %struct.__jmp_buf_tag]* %buf, i32 0, i32 0
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call void @longjmp(%struct.__jmp_buf_tag* %arraydecay1, i32 5) #1
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unreachable
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; CHECK: if.end:
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; CHECK: %[[VAR2]] = phi i32 [ %[[VAR1]], %if.then.split ], [ undef, %entry ]
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; CHECK: %[[SETJMP_TABLE_SIZE3]] = phi i32 [ %[[SETJMP_TABLE_SIZE2]], %if.then.split ], [ %[[SETJMP_TABLE_SIZE0]], %entry ]
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; CHECK: %[[SETJMP_TABLE3]] = phi i32* [ %[[SETJMP_TABLE2]], %if.then.split ], [ %[[SETJMP_TABLE0]], %entry ]
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}
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; Test a case when a function only calls other functions that are neither setjmp nor longjmp
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define void @only_other_func() {
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entry:
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call void @foo()
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ret void
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; CHECK: call void @foo()
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}
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; Test a case when a function only calls longjmp and not setjmp
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define void @only_longjmp() {
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entry:
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%buf = alloca [1 x %struct.__jmp_buf_tag], align 16
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%arraydecay = getelementptr inbounds [1 x %struct.__jmp_buf_tag], [1 x %struct.__jmp_buf_tag]* %buf, i32 0, i32 0
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call void @longjmp(%struct.__jmp_buf_tag* %arraydecay, i32 5) #1
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unreachable
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; CHECK: %[[ARRAYDECAY:.*]] = getelementptr inbounds
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; CHECK-NEXT: call void @emscripten_longjmp_jmpbuf(%struct.__jmp_buf_tag* %[[ARRAYDECAY]], i32 5)
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}
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; Test inline asm handling
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define void @inline_asm() {
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; CHECK-LABEL: @inline_asm
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entry:
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%env = alloca [1 x %struct.__jmp_buf_tag], align 16
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%arraydecay = getelementptr inbounds [1 x %struct.__jmp_buf_tag], [1 x %struct.__jmp_buf_tag]* %env, i32 0, i32 0
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%call = call i32 @setjmp(%struct.__jmp_buf_tag* %arraydecay) #4
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; Inline assembly should not generate __invoke wrappers.
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; Doing so would fail as inline assembly cannot be passed as a function pointer.
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; CHECK: call void asm sideeffect "", ""()
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; CHECK-NOT: __invoke_void
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call void asm sideeffect "", ""()
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ret void
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}
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; Test that the allocsize attribute is being transformed properly
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declare i8 *@allocator(i32, %struct.__jmp_buf_tag*) #3
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define i8 *@allocsize() {
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; CHECK-LABEL: @allocsize
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entry:
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%buf = alloca [1 x %struct.__jmp_buf_tag], align 16
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%arraydecay = getelementptr inbounds [1 x %struct.__jmp_buf_tag], [1 x %struct.__jmp_buf_tag]* %buf, i32 0, i32 0
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%call = call i32 @setjmp(%struct.__jmp_buf_tag* %arraydecay) #0
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; CHECK: call cc{{.*}} i8* @"__invoke_i8*_i32_%struct.__jmp_buf_tag*"([[ARGS:.*]]) #[[ALLOCSIZE_ATTR:[0-9]+]]
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%alloc = call i8* @allocator(i32 20, %struct.__jmp_buf_tag* %arraydecay) #3
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ret i8 *%alloc
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}
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; Tests if program does not crash when there's no setjmp function calls in the
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; module.
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@buffer = global [1 x %struct.__jmp_buf_tag] zeroinitializer, align 16
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define void @longjmp_only() {
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entry:
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; CHECK: call void @emscripten_longjmp_jmpbuf
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call void @longjmp(%struct.__jmp_buf_tag* getelementptr inbounds ([1 x %struct.__jmp_buf_tag], [1 x %struct.__jmp_buf_tag]* @buffer, i32 0, i32 0), i32 1) #1
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unreachable
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}
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; Tests if SSA rewrite works when a use and its def are within the same BB.
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define void @ssa_rewite_in_same_bb() {
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entry:
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call void @foo()
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br label %for.cond
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for.cond: ; preds = %for.inc, %entry
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; CHECK: %{{.*}} = phi i32 [ %var[[VARNO:.*]], %for.inc.split ]
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%0 = phi i32 [ %var, %for.inc ], [ undef, %entry ]
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%var = add i32 0, 0
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br label %for.inc
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for.inc: ; preds = %for.cond
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%call5 = call i32 @setjmp(%struct.__jmp_buf_tag* undef) #0
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br label %for.cond
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; CHECK: for.inc.split:
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; CHECK: %var[[VARNO]] = phi i32 [ %var, %for.inc ]
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}
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; Debug info test
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define void @setjmp_debug_info() !dbg !3 {
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; CHECK-LABEL: @setjmp_debug_info
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entry:
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%buf = alloca [1 x %struct.__jmp_buf_tag], align 16, !dbg !4
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%arraydecay = getelementptr inbounds [1 x %struct.__jmp_buf_tag], [1 x %struct.__jmp_buf_tag]* %buf, i32 0, i32 0, !dbg !5
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%call = call i32 @setjmp(%struct.__jmp_buf_tag* %arraydecay) #0, !dbg !6
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call void @foo(), !dbg !7
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ret void, !dbg !8
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; CHECK: entry:
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; CHECK-NEXT: call i8* @malloc(i32 40), !dbg ![[DL0:.*]]
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; CHECK-NEXT: bitcast {{.*}}, !dbg ![[DL0]]
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; CHECK: alloca {{.*}}, !dbg ![[DL0]]
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; CHECK: call i32* @saveSetjmp{{.*}}, !dbg ![[DL1:.*]]
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; CHECK-NEXT: call i32 @getTempRet0{{.*}}, !dbg ![[DL1]]
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; CHECK-NEXT: br {{.*}}, !dbg ![[DL2:.*]]
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; CHECK: entry.split:
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; CHECK: call {{.*}} void @__invoke_void{{.*}}, !dbg ![[DL2]]
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; CHECK: entry.split.split:
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; CHECK-NEXT: bitcast {{.*}}, !dbg ![[DL3:.*]]
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; CHECK-NEXT: call void @free{{.*}}, !dbg ![[DL3]]
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; CHECK: if.then1:
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; CHECK: call i32 @testSetjmp{{.*}}, !dbg ![[DL2]]
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; CHECK: if.end:
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; CHECK: call i32 @getTempRet0{{.*}}, !dbg ![[DL2]]
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; CHECK: if.then2:
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; CHECK: call void @emscripten_longjmp{{.*}}, !dbg ![[DL2]]
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; CHECK: if.end2:
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; CHECK: call void @setTempRet0{{.*}}, !dbg ![[DL2]]
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}
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declare void @foo()
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; Function Attrs: returns_twice
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declare i32 @setjmp(%struct.__jmp_buf_tag*) #0
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; Function Attrs: noreturn
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declare void @longjmp(%struct.__jmp_buf_tag*, i32) #1
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declare i32 @__gxx_personality_v0(...)
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declare i8* @__cxa_begin_catch(i8*)
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declare void @__cxa_end_catch()
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declare i8* @malloc(i32)
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declare void @free(i8*)
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; JS glue functions and invoke wrappers declaration
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; CHECK-DAG: declare i32 @getTempRet0()
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; CHECK-DAG: declare void @setTempRet0(i32)
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; CHECK-DAG: declare i32* @saveSetjmp(%struct.__jmp_buf_tag*, i32, i32*, i32)
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; CHECK-DAG: declare i32 @testSetjmp(i32, i32*, i32)
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; CHECK-DAG: declare void @emscripten_longjmp_jmpbuf(%struct.__jmp_buf_tag*, i32)
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; CHECK-DAG: declare void @emscripten_longjmp(i32, i32)
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; CHECK-DAG: declare void @__invoke_void(void ()*)
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; CHECK-DAG: declare void @"__invoke_void_%struct.__jmp_buf_tag*_i32"(void (%struct.__jmp_buf_tag*, i32)*, %struct.__jmp_buf_tag*, i32)
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attributes #0 = { returns_twice }
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attributes #1 = { noreturn }
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attributes #2 = { nounwind }
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attributes #3 = { allocsize(0) }
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; CHECK: attributes #[[ALLOCSIZE_ATTR]] = { allocsize(1) }
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!llvm.dbg.cu = !{!2}
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!llvm.module.flags = !{!0}
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!0 = !{i32 2, !"Debug Info Version", i32 3}
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!1 = !DIFile(filename: "lower-em-sjlj.c", directory: "test")
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!2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1)
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!3 = distinct !DISubprogram(name: "setjmp_debug_info", unit:!2, file: !1, line: 1)
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!4 = !DILocation(line:2, scope: !3)
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!5 = !DILocation(line:3, scope: !3)
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!6 = !DILocation(line:4, scope: !3)
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!7 = !DILocation(line:5, scope: !3)
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!8 = !DILocation(line:6, scope: !3)
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