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https://github.com/c64scene-ar/llvm-6502.git
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01d8611240
The coalescer is very aggressive at propagating constraints on the register classes, and the register allocator doesn’t know how to split sub-registers later to recover. This patch provides an escape valve for targets that encounter this problem to limit coalescing. This patch also implements such for ARM to lower register pressure when using lots of large register classes. This works around PR18825. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@213078 91177308-0d34-0410-b5e6-96231b3b80d8
35 lines
1.6 KiB
LLVM
35 lines
1.6 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 24 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(<8 x i64>* %src) #0 {
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entry:
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%0 = getelementptr inbounds <8 x i64>* %src, i32 0
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%1 = load <8 x i64>* %0, align 8
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%2 = getelementptr inbounds <8 x i64>* %src, i32 1
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%3 = load <8 x i64>* %2, align 8
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%4 = getelementptr inbounds <8 x i64>* %src, i32 2
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%5 = load <8 x i64>* %4, align 8
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%6 = getelementptr inbounds <8 x i64>* %src, i32 3
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%7 = load <8 x i64>* %6, align 8
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%8 = shufflevector <8 x i64> %1, <8 x i64> %3, <8 x i32> <i32 0, i32 8, i32 1, i32 9, i32 2, i32 10, i32 3, i32 11>
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%9 = shufflevector <8 x i64> %1, <8 x i64> %3, <8 x i32> <i32 4, i32 12, i32 5, i32 13, i32 6, i32 14, i32 7, i32 15>
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tail call void(<8 x i64>, <8 x i64>, <8 x i64>, <8 x i64>, <8 x i64>, <8 x i64>)* @foo(<8 x i64> %1, <8 x i64> %3, <8 x i64> %5, <8 x i64> %7, <8 x i64> %8, <8 x i64> %9)
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ret void
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}
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declare void @foo(<8 x i64>, <8 x i64>, <8 x i64>, <8 x i64>, <8 x i64>, <8 x i64>)
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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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