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7d7d99622f
The old system was fairly convoluted: * A temporary label was created. * A single PROLOG_LABEL was created with it. * A few MCCFIInstructions were created with the same label. The semantics were that the cfi instructions were mapped to the PROLOG_LABEL via the temporary label. The output position was that of the PROLOG_LABEL. The temporary label itself was used only for doing the mapping. The new CFI_INSTRUCTION has a 1:1 mapping to MCCFIInstructions and points to one by holding an index into the CFI instructions of this function. I did consider removing MMI.getFrameInstructions completelly and having CFI_INSTRUCTION own a MCCFIInstruction, but MCCFIInstructions have non trivial constructors and destructors and are somewhat big, so the this setup is probably better. The net result is that we don't create temporary labels that are never used. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@203204 91177308-0d34-0410-b5e6-96231b3b80d8
47 lines
1.7 KiB
LLVM
47 lines
1.7 KiB
LLVM
; RUN: llc < %s -O0 -relocation-model=pic -mtriple=thumbv7-apple-ios | FileCheck %s
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; <rdar://problem/12529625>
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@foo = global i32 34879, align 4
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@DWJumpTable2808 = global [2 x i32] [i32 sub (i32 ptrtoint (i8* blockaddress(@func, %14) to i32), i32 ptrtoint (i8* blockaddress(@func, %4) to i32)), i32 sub (i32 ptrtoint (i8* blockaddress(@func, %13) to i32), i32 ptrtoint (i8* blockaddress(@func, %4) to i32))]
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@0 = internal constant [45 x i8] c"func XXXXXXXXXXX :: bb xxxxxxxxxxxxxxxxxxxx\0A\00"
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; The indirect branch has the two destinations as successors. The lone PHI
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; statement shouldn't be implicitly defined.
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; CHECK-LABEL: func:
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; CHECK: Ltmp1: @ Block address taken
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; CHECK-NOT: @ implicit-def: R0
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; CHECK: @ 4-byte Reload
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define i32 @func() nounwind ssp {
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%1 = alloca i32, align 4
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%2 = load i32* @foo, align 4
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%3 = icmp eq i32 %2, 34879
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br label %4
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; <label>:4 ; preds = %0
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%5 = zext i1 %3 to i32
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%6 = mul i32 %5, 287
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%7 = add i32 %6, 2
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%8 = getelementptr [2 x i32]* @DWJumpTable2808, i32 0, i32 %5
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%9 = load i32* %8
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%10 = add i32 %9, ptrtoint (i8* blockaddress(@func, %4) to i32)
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%11 = inttoptr i32 %10 to i8*
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%12 = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([45 x i8]* @0, i32 0, i32 0))
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indirectbr i8* %11, [label %13, label %14]
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; <label>:13 ; preds = %4
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%tmp14 = phi i32 [ %7, %4 ]
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store i32 23958, i32* @foo, align 4
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%tmp15 = load i32* %1, align 4
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%tmp16 = icmp eq i32 %tmp15, 0
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%tmp17 = zext i1 %tmp16 to i32
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%tmp21 = add i32 %tmp17, %tmp14
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ret i32 %tmp21
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; <label>:14 ; preds = %4
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ret i32 42
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}
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declare i32 @printf(i8*, ...)
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