c142c06c19
While this should not matter for most architectures (where the program address space is 0), it is important for CHERI (and therefore Arm Morello). We use address space 200 for all of our code pointers and without this change we assert in the SelectionDAG handling of BlockAddress nodes. It is also useful for AVR: previously programs targeting AVR that attempt to read their own machine code via a pointer to a label would instead read from RAM using a pointer relative to the the start of program flash. Reviewed By: dylanmckay, theraven Differential Revision: https://reviews.llvm.org/D48803
19 lines
683 B
LLVM
19 lines
683 B
LLVM
; RUN: llc -mattr=sram,eijmpcall < %s -march=avr -verify-machineinstrs | FileCheck %s
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@brind.k = private unnamed_addr constant [2 x i8 addrspace(1)*] [i8 addrspace(1)* blockaddress(@brind, %return), i8 addrspace(1)* blockaddress(@brind, %b)], align 1
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define i8 @brind(i8 %p) {
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; CHECK-LABEL: brind:
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; CHECK: ijmp
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entry:
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%idxprom = sext i8 %p to i16
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%arrayidx = getelementptr inbounds [2 x i8 addrspace(1)*], [2 x i8 addrspace(1)*]* @brind.k, i16 0, i16 %idxprom
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%s = load i8 addrspace(1)*, i8 addrspace(1)** %arrayidx
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indirectbr i8 addrspace(1)* %s, [label %return, label %b]
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b:
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br label %return
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return:
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%retval.0 = phi i8 [ 4, %b ], [ 2, %entry ]
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ret i8 %retval.0
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}
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