8ecce69594
Issue Details: The addresses for SEH tables for Windows are incorrect as 1 was unconditionally being added to all addresses. +1 is required for the SEH end address (as it is exclusive), but the SEH start addresses is inclusive and so should be used as-is. In the IP2State tables, the addresses are +1 for AMD64 to handle the return address for a call being after the actual call instruction but are as-is for ARM and ARM64 as the `StateFromIp` function in the VC runtime automatically takes this into account and adjusts the address that is it looking up. Fix Details: * Split the `getLabel` function into two: `getLabel` (used for the SEH start address and ARM+ARM64 IP2State addresses) and `getLabelPlusOne` (for the SEH end address, and AMD64 IP2State addresses). Reviewed By: rnk Differential Revision: https://reviews.llvm.org/D107784
54 lines
1.5 KiB
LLVM
54 lines
1.5 KiB
LLVM
; RUN: llc -verify-machineinstrs < %s | FileCheck %s
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; BranchFolding used to remove our empty landingpad block, which is
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; undesirable.
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target datalayout = "e-m:w-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-pc-windows-msvc18.0.0"
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declare i32 @__C_specific_handler(...)
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declare void @bar()
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define void @foo(i1 %cond) personality i32 (...)* @__C_specific_handler {
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entry:
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br i1 %cond, label %return, label %try
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try: ; preds = %entry
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invoke void @bar()
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to label %fallthrough unwind label %dispatch
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dispatch: ; preds = %try
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%cs1 = catchswitch within none [label %catch] unwind to caller
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catch: ; preds = %dispatch
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%0 = catchpad within %cs1 [i8* null]
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catchret from %0 to label %return
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fallthrough: ; preds = %try
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unreachable
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return: ; preds = %catch, %entry
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ret void
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}
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; CHECK-LABEL: foo: # @foo
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; CHECK: testb $1, %cl
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; CHECK: je .LBB0_[[try:[0-9]+]]
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; CHECK: .LBB0_[[return:[0-9]+]]:
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; CHECK: retq
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; CHECK: .LBB0_[[try]]:
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; CHECK: .Ltmp0:
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; CHECK: callq bar
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; CHECK: .Ltmp1:
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; CHECK: .LBB0_[[catch:[0-9]+]]:
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; CHECK: .seh_handlerdata
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; CHECK-NEXT: .set .Lfoo$parent_frame_offset, 32
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; CHECK-NEXT: .long (.Llsda_end0-.Llsda_begin0)/16
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; CHECK-NEXT: .Llsda_begin0:
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; CHECK-NEXT: .long .Ltmp0@IMGREL
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; CHECK-NEXT: .long .Ltmp1@IMGREL+1
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; CHECK-NEXT: .long 1
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; CHECK-NEXT: .long .LBB0_[[catch]]@IMGREL
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