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8439df9506
We used to rely on the *eh_sjlj_setjmp instructions to mark that a function with setjmp/longjmp exception handling clobbers all the registers. But with the recent reorganization of ARM EH, those eh_sjlj_setjmp instructions are expanded away earlier, before PEI can see them to determine what registers to save and restore. Mark the dispatchsetup instruction in the same way, since that instruction cannot be expanded early. This also more accurately reflects when the registers are clobbered. llvm-svn: 146949
56 lines
1.8 KiB
LLVM
56 lines
1.8 KiB
LLVM
; RUN: llc < %s -O0 -mtriple=thumbv7-apple-ios | FileCheck %s
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; Radar 10567930: Make sure that all the caller-saved registers are saved and
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; restored in a function with setjmp/longjmp EH. In particular, r6 was not
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; being saved here.
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; CHECK: push {r4, r5, r6, r7, lr}
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%0 = type opaque
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%struct.NSConstantString = type { i32*, i32, i8*, i32 }
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define i32 @asdf(i32 %a, i32 %b, i8** %c, i8* %d) {
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bb:
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%tmp = alloca i32, align 4
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%tmp1 = alloca i32, align 4
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%tmp2 = alloca i8*, align 4
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%tmp3 = alloca i1
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%myException = alloca %0*, align 4
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%tmp4 = alloca i8*
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%tmp5 = alloca i32
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%exception = alloca %0*, align 4
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store i32 %a, i32* %tmp, align 4
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store i32 %b, i32* %tmp1, align 4
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store i8* %d, i8** %tmp2, align 4
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store i1 false, i1* %tmp3
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%tmp7 = load i8** %c
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%tmp10 = invoke %0* bitcast (i8* (i8*, i8*, ...)* @objc_msgSend to %0* (i8*, i8*, %0*)*)(i8* %tmp7, i8* %d, %0* null)
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to label %bb11 unwind label %bb15
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bb11: ; preds = %bb
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store %0* %tmp10, %0** %myException, align 4
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%tmp12 = load %0** %myException, align 4
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%tmp13 = bitcast %0* %tmp12 to i8*
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invoke void @objc_exception_throw(i8* %tmp13) noreturn
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to label %bb14 unwind label %bb15
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bb14: ; preds = %bb11
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unreachable
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bb15: ; preds = %bb11, %bb
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%tmp16 = landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__objc_personality_v0 to i8*)
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catch i8* null
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%tmp17 = extractvalue { i8*, i32 } %tmp16, 0
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store i8* %tmp17, i8** %tmp4
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%tmp18 = extractvalue { i8*, i32 } %tmp16, 1
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store i32 %tmp18, i32* %tmp5
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store i1 true, i1* %tmp3
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br label %bb56
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bb56:
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unreachable
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}
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declare i8* @objc_msgSend(i8*, i8*, ...) nonlazybind
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declare i32 @__objc_personality_v0(...)
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declare void @objc_exception_throw(i8*)
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