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3bb84c9bcc
The C and C++ semantics for compare_exchange require it to return a bool
indicating success. This gets mapped to LLVM IR which follows each cmpxchg with
an icmp of the value loaded against the desired value.
When lowered to ldxr/stxr loops, this extra comparison is redundant: its
results are implicit in the control-flow of the function.
This commit makes two changes: it replaces that icmp with appropriate PHI
nodes, and then makes sure earlyCSE is called after expansion to actually make
use of the opportunities revealed.
I've also added -{arm,aarch64}-enable-atomic-tidy options, so that
existing fragile tests aren't perturbed too much by the change. Many
of them either rely on undef/unreachable too pervasively to be
restored to something well-defined (particularly while making sure
they test the same obscure assert from many years ago), or depend on a
particular CFG shape, which is disrupted by SimplifyCFG.
rdar://problem/16227836
llvm-svn: 209883
72 lines
10 KiB
LLVM
72 lines
10 KiB
LLVM
; RUN: llc < %s -march=arm -mtriple=armv7-linux-gnueabihf -arm-atomic-cfg-tidy=0 -float-abi=hard -mcpu=cortex-a9 -O3 | FileCheck %s
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target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-n32-S64"
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; This test will generate spills/fills using vldmia instructions that access 64 bytes of memory.
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; Check that we don't crash when we generate these instructions on Cortex-A9.
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; CHECK: test:
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; CHECK: vstmia
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; CHECK: vldmia
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define void @test(i64* %src) #0 {
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entry:
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%arrayidx39 = getelementptr inbounds i64* %src, i32 13
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%vecinit285 = shufflevector <16 x i64> undef, <16 x i64> <i64 15, i64 16, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef>, <16 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8, i32 9, i32 10, i32 11, i32 12, i32 13, i32 16, i32 17>
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store <16 x i64> %vecinit285, <16 x i64>* undef, align 128
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%0 = load i64* undef, align 8
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%vecinit379 = insertelement <16 x i64> undef, i64 %0, i32 9
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%1 = load i64* undef, align 8
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%vecinit419 = insertelement <16 x i64> undef, i64 %1, i32 15
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store <16 x i64> %vecinit419, <16 x i64>* undef, align 128
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%vecinit579 = insertelement <16 x i64> undef, i64 0, i32 4
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%vecinit582 = shufflevector <16 x i64> %vecinit579, <16 x i64> <i64 6, i64 7, i64 8, i64 9, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef>, <16 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 16, i32 17, i32 18, i32 19, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef>
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%vecinit584 = insertelement <16 x i64> %vecinit582, i64 undef, i32 9
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%vecinit586 = insertelement <16 x i64> %vecinit584, i64 0, i32 10
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%vecinit589 = shufflevector <16 x i64> %vecinit586, <16 x i64> <i64 12, i64 13, i64 14, i64 15, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef>, <16 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8, i32 9, i32 10, i32 16, i32 17, i32 18, i32 19, i32 undef>
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%2 = load i64* undef, align 8
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%vecinit591 = insertelement <16 x i64> %vecinit589, i64 %2, i32 15
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store <16 x i64> %vecinit591, <16 x i64>* undef, align 128
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%vecinit694 = shufflevector <16 x i64> undef, <16 x i64> <i64 13, i64 14, i64 15, i64 16, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef>, <16 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8, i32 9, i32 10, i32 11, i32 16, i32 17, i32 18, i32 19>
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store <16 x i64> %vecinit694, <16 x i64>* undef, align 128
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%3 = load i64* undef, align 8
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%vecinit1331 = insertelement <16 x i64> undef, i64 %3, i32 14
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%4 = load i64* undef, align 8
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%vecinit1468 = insertelement <16 x i64> undef, i64 %4, i32 11
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%vecinit1471 = shufflevector <16 x i64> %vecinit1468, <16 x i64> <i64 13, i64 14, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef>, <16 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8, i32 9, i32 10, i32 11, i32 16, i32 17, i32 undef, i32 undef>
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%vecinit1474 = shufflevector <16 x i64> %vecinit1471, <16 x i64> <i64 15, i64 16, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef>, <16 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8, i32 9, i32 10, i32 11, i32 12, i32 13, i32 16, i32 17>
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store <16 x i64> %vecinit1474, <16 x i64>* undef, align 128
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%vecinit1552 = shufflevector <16 x i64> undef, <16 x i64> <i64 10, i64 11, i64 12, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef>, <16 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8, i32 16, i32 17, i32 18, i32 undef, i32 undef, i32 undef, i32 undef>
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%vecinit1555 = shufflevector <16 x i64> %vecinit1552, <16 x i64> <i64 13, i64 14, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef>, <16 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8, i32 9, i32 10, i32 11, i32 16, i32 17, i32 undef, i32 undef>
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%vecinit1558 = shufflevector <16 x i64> %vecinit1555, <16 x i64> <i64 15, i64 16, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef>, <16 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8, i32 9, i32 10, i32 11, i32 12, i32 13, i32 16, i32 17>
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store <16 x i64> %vecinit1558, <16 x i64>* undef, align 128
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%vecinit1591 = shufflevector <16 x i64> undef, <16 x i64> <i64 3, i64 4, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef>, <16 x i32> <i32 0, i32 1, i32 16, i32 17, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef>
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%vecinit1594 = shufflevector <16 x i64> %vecinit1591, <16 x i64> <i64 5, i64 6, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef>, <16 x i32> <i32 0, i32 1, i32 2, i32 3, i32 16, i32 17, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef>
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%vecinit1597 = shufflevector <16 x i64> %vecinit1594, <16 x i64> <i64 7, i64 8, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef>, <16 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 16, i32 17, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef>
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%vecinit1599 = insertelement <16 x i64> %vecinit1597, i64 undef, i32 8
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%vecinit1601 = insertelement <16 x i64> %vecinit1599, i64 undef, i32 9
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%vecinit1603 = insertelement <16 x i64> %vecinit1601, i64 undef, i32 10
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%5 = load i64* undef, align 8
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%vecinit1605 = insertelement <16 x i64> %vecinit1603, i64 %5, i32 11
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%vecinit1608 = shufflevector <16 x i64> %vecinit1605, <16 x i64> <i64 13, i64 14, i64 15, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef>, <16 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8, i32 9, i32 10, i32 11, i32 16, i32 17, i32 18, i32 undef>
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%6 = load i64* undef, align 8
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%vecinit1610 = insertelement <16 x i64> %vecinit1608, i64 %6, i32 15
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store <16 x i64> %vecinit1610, <16 x i64>* undef, align 128
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%vecinit2226 = shufflevector <16 x i64> undef, <16 x i64> <i64 6, i64 7, i64 8, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef>, <16 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 16, i32 17, i32 18, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef>
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%7 = load i64* undef, align 8
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%vecinit2228 = insertelement <16 x i64> %vecinit2226, i64 %7, i32 8
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%vecinit2230 = insertelement <16 x i64> %vecinit2228, i64 undef, i32 9
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%vecinit2233 = shufflevector <16 x i64> %vecinit2230, <16 x i64> <i64 11, i64 12, i64 13, i64 14, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef>, <16 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8, i32 9, i32 16, i32 17, i32 18, i32 19, i32 undef, i32 undef>
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%vecinit2236 = shufflevector <16 x i64> %vecinit2233, <16 x i64> <i64 15, i64 16, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef>, <16 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8, i32 9, i32 10, i32 11, i32 12, i32 13, i32 16, i32 17>
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store <16 x i64> %vecinit2236, <16 x i64>* undef, align 128
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%vecinit2246 = shufflevector <16 x i64> undef, <16 x i64> <i64 4, i64 5, i64 6, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef>, <16 x i32> <i32 0, i32 1, i32 2, i32 16, i32 17, i32 18, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef>
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%vecinit2249 = shufflevector <16 x i64> %vecinit2246, <16 x i64> <i64 7, i64 8, i64 9, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef>, <16 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 16, i32 17, i32 18, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef>
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%vecinit2252 = shufflevector <16 x i64> %vecinit2249, <16 x i64> <i64 10, i64 11, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef>, <16 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8, i32 16, i32 17, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef>
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%vecinit2255 = shufflevector <16 x i64> %vecinit2252, <16 x i64> <i64 12, i64 13, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef>, <16 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8, i32 9, i32 10, i32 16, i32 17, i32 undef, i32 undef, i32 undef>
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%8 = load i64* %arrayidx39, align 8
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%vecinit2257 = insertelement <16 x i64> %vecinit2255, i64 %8, i32 13
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%vecinit2260 = shufflevector <16 x i64> %vecinit2257, <16 x i64> <i64 15, i64 16, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef>, <16 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8, i32 9, i32 10, i32 11, i32 12, i32 13, i32 16, i32 17>
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store <16 x i64> %vecinit2260, <16 x i64>* null, align 128
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ret void
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}
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attributes #0 = { noredzone "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-frame-pointer-elim-non-leaf"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "unsafe-fp-math"="false" "use-soft-float"="false" }
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