e438513f2e
Unsigned subtraction wrap-around occurs in `emitGlobalConstantImpl` on an AIX-specific code path from 8e4423eb0888 when a structure type has zero elements. With assertions enabled, this manifests as: ``` TypeSize llvm::StructLayout::getElementOffset(unsigned int) const: Assertion `Idx < NumElements && "Invalid element idx!"' failed. ```
21 lines
877 B
LLVM
21 lines
877 B
LLVM
; RUN: llc -verify-machineinstrs -mtriple powerpc64-ibm-aix-xcoff -mcpu=pwr7 < %s | FileCheck %s
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; RUN: llc -verify-machineinstrs -mtriple powerpc64-ibm-aix-xcoff -mcpu=pwr7 --filetype=obj -o %t.o < %s
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; RUN: llvm-objdump --syms %t.o | FileCheck %s --check-prefix=OBJ
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%struct.anon = type {}
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@a = internal constant %struct.anon zeroinitializer, align 1
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@b = internal constant [6 x i8] c"hello\00", align 1
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; CHECK: .csect L.._MergedGlobals[RO],2
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; CHECK-NEXT: .lglobl a # @_MergedGlobals
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; CHECK-NEXT: .lglobl b
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; CHECK-NEXT: a:
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; CHECK-NEXT: b:
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; CHECK-NEXT: .string "hello"
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; OBJ: 0000000000000000 l .text 0000000000000006 L.._MergedGlobals
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; OBJ-NEXT: 0000000000000000 l .text (csect: L.._MergedGlobals) 0000000000000000 a
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; OBJ-NEXT: 0000000000000000 l .text (csect: L.._MergedGlobals) 0000000000000000 b
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