2e46312ffd
Some GEPs were not being split, presumably because that split would just be undone by the DAGCombiner. Not performing those splits can prevent important optimizations, such as preventing the element indices / member offsets from being (partially) folded into load/store instruction immediates. This patch: - Makes the splits also occur in the cases where the base address and the GEP are in the same BB. - Ensures that the DAGCombiner doesn't reassociate them back again. Differential Revision: https://reviews.llvm.org/D60294 llvm-svn: 363544
35 lines
1.7 KiB
LLVM
35 lines
1.7 KiB
LLVM
; RUN: llc < %s -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>, <8 x i64>* %src, i32 0
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%1 = load <8 x i64>, <8 x i64>* %0, align 8
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%2 = getelementptr inbounds <8 x i64>, <8 x i64>* %src, i32 1
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%3 = load <8 x i64>, <8 x i64>* %2, align 8
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%4 = getelementptr inbounds <8 x i64>, <8 x i64>* %src, i32 2
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%5 = load <8 x i64>, <8 x i64>* %4, align 8
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%6 = getelementptr inbounds <8 x i64>, <8 x i64>* %src, i32 3
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%7 = load <8 x i64>, <8 x i64>* %6, align 8
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%8 = shufflevector <8 x i64> %1, <8 x i64> %3, <8 x i32> <i32 12, i32 4, i32 15, i32 14, i32 8, i32 13, i32 2, i32 9>
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%9 = shufflevector <8 x i64> %1, <8 x i64> %3, <8 x i32> <i32 1, i32 0, i32 3, i32 10, i32 5, i32 11, i32 7, i32 6>
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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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