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When using the large code model with FastISel (for example via clang -O0 which adds the optnone attribute), FP constants could still be materialized using adrp + ldr. Unconditionally enable the existing path for MachO to materialize the constant in code. For testing, restore literal_pools_float.ll to exercise the constant pool and add two optnone-functions that return a float and a double, respectively. Consolidate fpimm.ll and add a new fast-isel-fpimm.ll to check the code paths taken with FastISel. Differential Revision: https://reviews.llvm.org/D99607
80 lines
3.3 KiB
LLVM
80 lines
3.3 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 -o - %s -mtriple=aarch64-none-none-eabi -code-model=tiny -mcpu=cyclone | FileCheck --check-prefix=CHECK-TINY %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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; RUN: llc -verify-machineinstrs < %s -mtriple=aarch64-none-none-eabi -code-model=tiny -mattr=-fp-armv8 | FileCheck --check-prefix=CHECK-NOFP-TINY %s
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@varfloat = dso_local global float 0.0
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@vardouble = dso_local global double 0.0
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define dso_local void @floating_lits() optsize {
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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, 511.0
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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-TINY: ldr [[LIT128:s[0-9]+]], [[CURLIT:.LCPI[0-9]+_[0-9]+]]
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; CHECK-NOFP-TINY-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, 511.0
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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-TINY: ldr [[LIT129:d[0-9]+]], [[CURLIT:.LCPI[0-9]+_[0-9]+]]
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; CHECK-NOFP-TINY-NOT: ldr {{d[0-9]+}},
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; CHECK-NOFP-TINY-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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define dso_local float @float_ret_optnone() optnone noinline {
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; CHECK-LABEL: float_ret_optnone:
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ret float 0x3FB99999A0000000
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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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; In the large code model, FastISel cannot load from the constant pool.
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; CHECK-LARGE-NOT: adrp
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; CHECK-LARGE-NOT: ldr
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}
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define dso_local double @double_ret_optnone() optnone noinline {
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; CHECK-LABEL: double_ret_optnone:
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ret double 0.1
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; CHECK: adrp x[[LITBASE:[0-9]+]], [[CURLIT:.LCPI[0-9]+_[0-9]+]]
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; CHECK: ldr [[LIT128:d[0-9]+]], [x[[LITBASE]], {{#?}}:lo12:[[CURLIT]]]
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; In the large code model, FastISel cannot load from the constant pool.
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; CHECK-LARGE-NOT: adrp
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; CHECK-LARGE-NOT: ldr
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}
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