llvm-mirror/test/CodeGen/AArch64/fpimm.ll
Adhemerval Zanella 36b7b3c0fa [AArch64] Optimize floating point materialization
This patch changes isFPImmLegal to return if the value can be enconded
as the immediate operand of a logical instruction besides checking if
for immediate field for fmov.

This optimizes some floating point materization, inclusive values
used on isinf lowering.

Reviewed By: rengolin, efriedma, evandro

Differential Revision: https://reviews.llvm.org/D57044

llvm-svn: 352866
2019-02-01 12:26:06 +00:00

74 lines
2.4 KiB
LLVM

; RUN: llc -mtriple=aarch64-linux-gnu -verify-machineinstrs < %s | FileCheck %s
; RUN: llc -mtriple=aarch64-apple-darwin -code-model=large -verify-machineinstrs < %s | FileCheck %s --check-prefix=LARGE
; RUN: llc -mtriple=aarch64-apple-darwin -code-model=large -fast-isel -fast-isel-abort=1 -verify-machineinstrs < %s | FileCheck %s --check-prefix=LARGE
; RUN: llc -mtriple=aarch64-none-eabi -code-model=tiny -verify-machineinstrs < %s | FileCheck %s --check-prefix=TINY
@varf32 = global float 0.0
@varf64 = global double 0.0
define void @check_float() {
; CHECK-LABEL: check_float:
; TINY-LABEL: check_float:
%val = load float, float* @varf32
%newval1 = fadd float %val, 8.5
store volatile float %newval1, float* @varf32
; CHECK-DAG: fmov {{s[0-9]+}}, #8.5
; TINY-DAG: fmov {{s[0-9]+}}, #8.5
%newval2 = fadd float %val, 128.0
store volatile float %newval2, float* @varf32
; CHECK-DAG: mov [[W128:w[0-9]+]], #1124073472
; CHECK-DAG: fmov {{s[0-9]+}}, [[W128]]
; TINY-DAG: mov [[W128:w[0-9]+]], #1124073472
; TINY-DAG: fmov {{s[0-9]+}}, [[W128]]
; CHECK: ret
; TINY: ret
ret void
}
define void @check_double() {
; CHECK-LABEL: check_double:
; TINY-LABEL: check_double:
%val = load double, double* @varf64
%newval1 = fadd double %val, 8.5
store volatile double %newval1, double* @varf64
; CHECK-DAG: fmov {{d[0-9]+}}, #8.5
; TINY-DAG: fmov {{d[0-9]+}}, #8.5
%newval2 = fadd double %val, 128.0
store volatile double %newval2, double* @varf64
; CHECK-DAG: mov [[X128:x[0-9]+]], #4638707616191610880
; CHECK-DAG: fmov {{d[0-9]+}}, [[X128]]
; TINY-DAG: mov [[X128:x[0-9]+]], #4638707616191610880
; TINY-DAG: fmov {{d[0-9]+}}, [[X128]]
; CHECK: ret
; TINY: ret
ret void
}
; LARGE-LABEL: check_float2
; LARGE: mov [[REG:w[0-9]+]], #4059
; LARGE-NEXT: movk [[REG]], #16457, lsl #16
; LARGE-NEXT: fmov s0, [[REG]]
; TINY-LABEL: check_float2
; TINY: ldr s0, .LCPI2_0
define float @check_float2() {
ret float 3.14159274101257324218750
}
; LARGE-LABEL: check_double2
; LARGE: mov [[REG:x[0-9]+]], #11544
; LARGE-NEXT: movk [[REG]], #21572, lsl #16
; LARGE-NEXT: movk [[REG]], #8699, lsl #32
; LARGE-NEXT: movk [[REG]], #16393, lsl #48
; LARGE-NEXT: fmov d0, [[REG]]
; TINY-LABEL: check_double2
; TINY: ldr d0, .LCPI3_0
define double @check_double2() {
ret double 3.1415926535897931159979634685441851615905761718750
}