Instead of a custom implementation of replaceAllUsesWith, we just call
replaceAllUsesWith and recreate llvm.used and llvm.compiler-used.
This change is particularity interesting because it makes llvm see
through what clang is doing with static used functions in extern "C"
contexts. With this change, running clang -O2 in
extern "C" {
__attribute__((used)) static void foo() {}
}
produces
@llvm.used = appending global [1 x i8*] [i8* bitcast (void ()* @foo to
i8*)], section "llvm.metadata"
define internal void @foo() #0 {
entry:
ret void
}
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183756 91177308-0d34-0410-b5e6-96231b3b80d8
It will be tested in the next commit which moves another user to identify_magic.
Original message:
Fix an out of bounds array access.
We were looking at Magic[5] without checking Length. Since this path would not
return unless Length >= 18 anyway, just move the >= 18 check up.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183753 91177308-0d34-0410-b5e6-96231b3b80d8
This enables the compiler to see the enum and produce warnings about a switch
not being fully covered. Fix one of these warnings.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183749 91177308-0d34-0410-b5e6-96231b3b80d8
The effect of llvm.used is to introduce an invisible reference, so this seems
a reasonable restriction. It will be used to provide an easy ordering of
the entries in llvm.used.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183743 91177308-0d34-0410-b5e6-96231b3b80d8
Negative zero is returned by the primary expression parser as INT32_MIN, so all that the method needs to do is to accept this value.
Behavior already present for Thumb2.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183734 91177308-0d34-0410-b5e6-96231b3b80d8
- Don't use assert(0), or tests may pass or fail according to assertions.
- For now, The tests are marked as XFAIL for win32 hosts.
FIXME: Could we avoid XFAIL to specify triple in the RUN lines?
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183728 91177308-0d34-0410-b5e6-96231b3b80d8
Currently, only emitting the ELF header is supported (no sections or
segments).
The ELFYAML code organization is broadly similar to the COFFYAML code.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183711 91177308-0d34-0410-b5e6-96231b3b80d8
Some ARM CPUs only support ARM mode (ancient v4 ones, for example) and some
only support Thumb mode (M-class ones currently). This makes sure such CPUs
default to the correct mode and makes the AsmParser diagnose an attempt to
switch modes incorrectly.
rdar://14024354
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183710 91177308-0d34-0410-b5e6-96231b3b80d8
Previously LEA64_32r went through virtually the entire backend thinking it was
using 32-bit registers until its blissful illusions were cruelly snatched away
by MCInstLower and 64-bit equivalents were substituted at the last minute.
This patch makes it behave normally, and take 64-bit registers as sources all
the way through. Previous uses (for 32-bit arithmetic) are accommodated via
SUBREG_TO_REG instructions which make the types and classes agree properly.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183693 91177308-0d34-0410-b5e6-96231b3b80d8
A plain "sc" without argument is supposed to be treated like "sc 0"
by the assembler. This patch adds a corresponding alias.
Problem reported by Joerg Sonnenberger.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183687 91177308-0d34-0410-b5e6-96231b3b80d8
The extended branch mnemonics are supposed to use an implied CR0
if there is no explicit condition register specified. This patch
adds extra variants of the mnemonics to this effect.
Problem reported by Joerg Sonnenberger.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183686 91177308-0d34-0410-b5e6-96231b3b80d8
This patch removes some redundancy by generating the extended branch
mnemonics via a multiclass.
No change in behaviour expected.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183685 91177308-0d34-0410-b5e6-96231b3b80d8
We were looking at Magic[5] without checking Length. Since this path would not
return unless Length >= 18 anyway, just move the >= 18 check up.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183666 91177308-0d34-0410-b5e6-96231b3b80d8
building outside projects with a different compiler than that used to build
LLVM itself (eg switching between gcc and clang).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183650 91177308-0d34-0410-b5e6-96231b3b80d8
the Mips16 port. A few of the psuedos could either take signed
or unsigned arguments and I did not distinguish the case and improperly
rejected some valid cases that the assembler had previously accepted
when they were pure pseudos that expanded as assembly instructions.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183633 91177308-0d34-0410-b5e6-96231b3b80d8
Since we have ARM unwind directive parser and assembler, we
can check the correctness in two stages:
1. From LLVM assembly (.ll) to ARM assembly (.s)
2. From ARM assembly (.s) to ELF object file (.o)
We already have several "*.s to *.o" test cases. This CL adds
some "*.ll to *.s" test cases and removes the redundant "*.ll to *.o"
test cases.
New test cases to check "*.ll to *.s" code generator:
- ehabi.ll: Check the correctness of the generated unwind directives.
- section-name.ll: Check the section name of functions.
Removed test cases:
- ehabi-mc-cantunwind.ll
(Covered by ehabi-cantunwind.ll, and eh-directive-cantunwind.s)
- ehabi-mc-compact-pr0.ll
(Covered by ehabi.ll, eh-compact-pr0.s, eh-directive-save.s, and
eh-directive-setfp.s)
- ehabi-mc-compact-pr1.ll
(Covered by ehabi.ll, eh-compact-pr1.s, eh-directive-save.s, and
eh-directive-setfp.s)
- ehabi-mc.ll
(Covered by ehabi.ll, and eh-directive-integrated-test.s)
- ehabi-mc-section-group.ll
(Covered by section-name.ll, and eh-directive-section-comdat.s)
- ehabi-mc-section.ll
(Covered by section-name.ll, and eh-directive-section.s)
- ehabi-mc-sh_link.ll
(Covered by eh-directive-text-section.s, and eh-directive-section.s)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183628 91177308-0d34-0410-b5e6-96231b3b80d8
Changes to ARM unwind opcode assembler:
* Fix multiple .save or .vsave directives. Besides, the
order is preserved now.
* For the directives which will generate multiple opcodes,
such as ".save {r0-r11}", the order of the unwind opcode
is fixed now, i.e. the registers with less encoding value
are popped first.
* Fix the $sp offset calculation. Now, we can use the
.setfp, .pad, .save, and .vsave directives at any order.
Changes to test cases:
* Add test cases to check the order of multiple opcodes
for the .save directive.
* Fix the incorrect $sp offset in the test case. The
stack pointer offset specified in the test case was
incorrect. (Changed test cases: ehabi-mc-section.ll and
ehabi-mc.ll)
* The opcode to restore $sp are slightly reordered. The
behavior are not changed, and the new output is same
as the output of GNU as. (Changed test cases:
eh-directive-pad.s and eh-directive-setfp.s)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183627 91177308-0d34-0410-b5e6-96231b3b80d8
Variadic functions are particularly fragile in the face of ABI changes, so this
limits how much the pass changes them
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183625 91177308-0d34-0410-b5e6-96231b3b80d8
