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ARM seems to prefer that long literals be formed from their little end in order to promote the fusion of the instrs pairs MOV/MOVK and MOVK/MOVK on Cortex A57 and others (v. "Cortex A57 Software Optimisation Guide", section 4.14). Differential revision: https://reviews.llvm.org/D28697 llvm-svn: 292422
47 lines
2.0 KiB
LLVM
47 lines
2.0 KiB
LLVM
; RUN: llc -verify-machineinstrs -o - %s -mtriple=aarch64-none-linux-gnu -mcpu=cyclone | FileCheck %s
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; RUN: llc -verify-machineinstrs -o - %s -mtriple=aarch64-none-linux-gnu -code-model=large -mcpu=cyclone | FileCheck --check-prefix=CHECK-LARGE %s
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; RUN: llc -verify-machineinstrs < %s -mtriple=aarch64-none-linux-gnu -mattr=-fp-armv8 | FileCheck --check-prefix=CHECK-NOFP %s
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; RUN: llc -verify-machineinstrs < %s -mtriple=aarch64-none-linux-gnu -code-model=large -mattr=-fp-armv8 | FileCheck --check-prefix=CHECK-NOFP-LARGE %s
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@varfloat = global float 0.0
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@vardouble = global double 0.0
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define void @floating_lits() {
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; CHECK-LABEL: floating_lits:
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%floatval = load float, float* @varfloat
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%newfloat = fadd float %floatval, 128.0
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; CHECK: adrp x[[LITBASE:[0-9]+]], [[CURLIT:.LCPI[0-9]+_[0-9]+]]
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; CHECK: ldr [[LIT128:s[0-9]+]], [x[[LITBASE]], {{#?}}:lo12:[[CURLIT]]]
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; CHECK-NOFP-NOT: ldr {{s[0-9]+}},
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; CHECK-LARGE: movz x[[LITADDR:[0-9]+]], #:abs_g0_nc:[[CURLIT:.LCPI[0-9]+_[0-9]+]]
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; CHECK-LARGE: movk x[[LITADDR]], #:abs_g1_nc:[[CURLIT]]
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; CHECK-LARGE: movk x[[LITADDR]], #:abs_g2_nc:[[CURLIT]]
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; CHECK-LARGE: movk x[[LITADDR]], #:abs_g3:[[CURLIT]]
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; CHECK-LARGE: ldr {{s[0-9]+}}, [x[[LITADDR]]]
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; CHECK-LARGE: fadd
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; CHECK-NOFP-LARGE-NOT: ldr {{s[0-9]+}},
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; CHECK-NOFP-LARGE-NOT: fadd
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store float %newfloat, float* @varfloat
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%doubleval = load double, double* @vardouble
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%newdouble = fadd double %doubleval, 129.0
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; CHECK: adrp x[[LITBASE:[0-9]+]], [[CURLIT:.LCPI[0-9]+_[0-9]+]]
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; CHECK: ldr [[LIT129:d[0-9]+]], [x[[LITBASE]], {{#?}}:lo12:[[CURLIT]]]
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; CHECK-NOFP-NOT: ldr {{d[0-9]+}},
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; CHECK-NOFP-NOT: fadd
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; CHECK-LARGE: movz x[[LITADDR:[0-9]+]], #:abs_g0_nc:[[CURLIT:.LCPI[0-9]+_[0-9]+]]
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; CHECK-LARGE: movk x[[LITADDR]], #:abs_g1_nc:[[CURLIT]]
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; CHECK-LARGE: movk x[[LITADDR]], #:abs_g2_nc:[[CURLIT]]
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; CHECK-LARGE: movk x[[LITADDR]], #:abs_g3:[[CURLIT]]
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; CHECK-LARGE: ldr {{d[0-9]+}}, [x[[LITADDR]]]
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; CHECK-NOFP-LARGE-NOT: ldr {{d[0-9]+}},
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store double %newdouble, double* @vardouble
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ret void
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}
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