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5cdc3a949a
than doing the same via constpool: 1. Load from constpool costs 3 cycles on A9, movt/movw pair - just 2. 2. Load from constpool might stall up to 300 cycles due to cache miss. 3. Movt/movw does not use load/store unit. 4. Less constpool entries => better compiler performance. This is only enabled on ELF systems, since darwin does not have needed relocations (yet). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89720 91177308-0d34-0410-b5e6-96231b3b80d8
21 lines
611 B
LLVM
21 lines
611 B
LLVM
; RUN: llc < %s | 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"
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target triple = "armv7-eabi"
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@foo = common global i32 0 ; <i32*> [#uses=1]
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define arm_aapcs_vfpcc i32* @bar1() nounwind readnone {
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entry:
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; CHECK: movw r0, :lower16:foo
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; CHECK-NEXT: movt r0, :upper16:foo
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ret i32* @foo
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}
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define arm_aapcs_vfpcc void @bar2(i32 %baz) nounwind {
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entry:
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; CHECK: movw r1, :lower16:foo
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; CHECK-NEXT: movt r1, :upper16:foo
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store i32 %baz, i32* @foo, align 4
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ret void
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}
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