mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-26 21:32:10 +00:00
25f4d51bcb
Check for single use of fmul node in fused multiply patterns to allow generation of fused multiply add/sub instructions. Otherwise fmul operation ends up being repeated more than once which does not help peformance on targets with only one MAC unit, as for example cortex-a53. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@197929 91177308-0d34-0410-b5e6-96231b3b80d8
164 lines
6.2 KiB
LLVM
164 lines
6.2 KiB
LLVM
; RUN: llc -verify-machineinstrs < %s -mtriple=aarch64-none-linux-gnu -fp-contract=fast | FileCheck %s
|
|
; RUN: llc -verify-machineinstrs < %s -mtriple=aarch64-none-linux-gnu | FileCheck %s -check-prefix=CHECK-NOFAST
|
|
|
|
declare float @llvm.fma.f32(float, float, float)
|
|
declare double @llvm.fma.f64(double, double, double)
|
|
|
|
define float @test_fmadd(float %a, float %b, float %c) {
|
|
; CHECK-LABEL: test_fmadd:
|
|
; CHECK-NOFAST-LABEL: test_fmadd:
|
|
%val = call float @llvm.fma.f32(float %a, float %b, float %c)
|
|
; CHECK: fmadd {{s[0-9]+}}, {{s[0-9]+}}, {{s[0-9]+}}, {{s[0-9]+}}
|
|
; CHECK-NOFAST: fmadd {{s[0-9]+}}, {{s[0-9]+}}, {{s[0-9]+}}, {{s[0-9]+}}
|
|
ret float %val
|
|
}
|
|
|
|
define float @test_fmsub(float %a, float %b, float %c) {
|
|
; CHECK-LABEL: test_fmsub:
|
|
; CHECK-NOFAST-LABEL: test_fmsub:
|
|
%nega = fsub float -0.0, %a
|
|
%val = call float @llvm.fma.f32(float %nega, float %b, float %c)
|
|
; CHECK: fmsub {{s[0-9]+}}, {{s[0-9]+}}, {{s[0-9]+}}, {{s[0-9]+}}
|
|
; CHECK-NOFAST: fmsub {{s[0-9]+}}, {{s[0-9]+}}, {{s[0-9]+}}, {{s[0-9]+}}
|
|
ret float %val
|
|
}
|
|
|
|
define float @test_fnmadd(float %a, float %b, float %c) {
|
|
; CHECK-LABEL: test_fnmadd:
|
|
; CHECK-NOFAST-LABEL: test_fnmadd:
|
|
%nega = fsub float -0.0, %a
|
|
%negc = fsub float -0.0, %c
|
|
%val = call float @llvm.fma.f32(float %nega, float %b, float %negc)
|
|
; CHECK: fnmadd {{s[0-9]+}}, {{s[0-9]+}}, {{s[0-9]+}}, {{s[0-9]+}}
|
|
; CHECK-NOFAST: fnmadd {{s[0-9]+}}, {{s[0-9]+}}, {{s[0-9]+}}, {{s[0-9]+}}
|
|
ret float %val
|
|
}
|
|
|
|
define float @test_fnmsub(float %a, float %b, float %c) {
|
|
; CHECK-LABEL: test_fnmsub:
|
|
; CHECK-NOFAST-LABEL: test_fnmsub:
|
|
%negc = fsub float -0.0, %c
|
|
%val = call float @llvm.fma.f32(float %a, float %b, float %negc)
|
|
; CHECK: fnmsub {{s[0-9]+}}, {{s[0-9]+}}, {{s[0-9]+}}, {{s[0-9]+}}
|
|
; CHECK-NOFAST: fnmsub {{s[0-9]+}}, {{s[0-9]+}}, {{s[0-9]+}}, {{s[0-9]+}}
|
|
ret float %val
|
|
}
|
|
|
|
define double @testd_fmadd(double %a, double %b, double %c) {
|
|
; CHECK-LABEL: testd_fmadd:
|
|
; CHECK-NOFAST-LABEL: testd_fmadd:
|
|
%val = call double @llvm.fma.f64(double %a, double %b, double %c)
|
|
; CHECK: fmadd {{d[0-9]+}}, {{d[0-9]+}}, {{d[0-9]+}}, {{d[0-9]+}}
|
|
; CHECK-NOFAST: fmadd {{d[0-9]+}}, {{d[0-9]+}}, {{d[0-9]+}}, {{d[0-9]+}}
|
|
ret double %val
|
|
}
|
|
|
|
define double @testd_fmsub(double %a, double %b, double %c) {
|
|
; CHECK-LABEL: testd_fmsub:
|
|
; CHECK-NOFAST-LABEL: testd_fmsub:
|
|
%nega = fsub double -0.0, %a
|
|
%val = call double @llvm.fma.f64(double %nega, double %b, double %c)
|
|
; CHECK: fmsub {{d[0-9]+}}, {{d[0-9]+}}, {{d[0-9]+}}, {{d[0-9]+}}
|
|
; CHECK-NOFAST: fmsub {{d[0-9]+}}, {{d[0-9]+}}, {{d[0-9]+}}, {{d[0-9]+}}
|
|
ret double %val
|
|
}
|
|
|
|
define double @testd_fnmadd(double %a, double %b, double %c) {
|
|
; CHECK-LABEL: testd_fnmadd:
|
|
; CHECK-NOFAST-LABEL: testd_fnmadd:
|
|
%nega = fsub double -0.0, %a
|
|
%negc = fsub double -0.0, %c
|
|
%val = call double @llvm.fma.f64(double %nega, double %b, double %negc)
|
|
; CHECK: fnmadd {{d[0-9]+}}, {{d[0-9]+}}, {{d[0-9]+}}, {{d[0-9]+}}
|
|
; CHECK-NOFAST: fnmadd {{d[0-9]+}}, {{d[0-9]+}}, {{d[0-9]+}}, {{d[0-9]+}}
|
|
ret double %val
|
|
}
|
|
|
|
define double @testd_fnmsub(double %a, double %b, double %c) {
|
|
; CHECK-LABEL: testd_fnmsub:
|
|
; CHECK-NOFAST-LABEL: testd_fnmsub:
|
|
%negc = fsub double -0.0, %c
|
|
%val = call double @llvm.fma.f64(double %a, double %b, double %negc)
|
|
; CHECK: fnmsub {{d[0-9]+}}, {{d[0-9]+}}, {{d[0-9]+}}, {{d[0-9]+}}
|
|
; CHECK-NOFAST: fnmsub {{d[0-9]+}}, {{d[0-9]+}}, {{d[0-9]+}}, {{d[0-9]+}}
|
|
ret double %val
|
|
}
|
|
|
|
define float @test_fmadd_unfused(float %a, float %b, float %c) {
|
|
; CHECK-LABEL: test_fmadd_unfused:
|
|
; CHECK-NOFAST-LABEL: test_fmadd_unfused:
|
|
%prod = fmul float %b, %c
|
|
%sum = fadd float %a, %prod
|
|
; CHECK: fmadd {{s[0-9]+}}, {{s[0-9]+}}, {{s[0-9]+}}, {{s[0-9]+}}
|
|
; CHECK-NOFAST-NOT: fmadd {{s[0-9]+}}, {{s[0-9]+}}, {{s[0-9]+}}, {{s[0-9]+}}
|
|
; CHECK-NOFAST: fmul {{s[0-9]+}}, {{s[0-9]+}}, {{s[0-9]+}}
|
|
; CHECK-NOFAST: fadd {{s[0-9]+}}, {{s[0-9]+}}, {{s[0-9]+}}
|
|
ret float %sum
|
|
}
|
|
|
|
define float @test_fmsub_unfused(float %a, float %b, float %c) {
|
|
; CHECK-LABEL: test_fmsub_unfused:
|
|
; CHECK-NOFAST-LABEL: test_fmsub_unfused:
|
|
%prod = fmul float %b, %c
|
|
%diff = fsub float %a, %prod
|
|
; CHECK: fmsub {{s[0-9]+}}, {{s[0-9]+}}, {{s[0-9]+}}, {{s[0-9]+}}
|
|
; CHECK-NOFAST-NOT: fmsub {{s[0-9]+}}, {{s[0-9]+}}, {{s[0-9]+}}, {{s[0-9]+}}
|
|
; CHECK-NOFAST: fmul {{s[0-9]+}}, {{s[0-9]+}}, {{s[0-9]+}}
|
|
; CHECK-NOFAST: fsub {{s[0-9]+}}, {{s[0-9]+}}, {{s[0-9]+}}
|
|
ret float %diff
|
|
}
|
|
|
|
define float @test_fnmadd_unfused(float %a, float %b, float %c) {
|
|
; CHECK-LABEL: test_fnmadd_unfused:
|
|
; CHECK-NOFAST-LABEL: test_fnmadd_unfused:
|
|
%nega = fsub float -0.0, %a
|
|
%prod = fmul float %b, %c
|
|
%diff = fsub float %nega, %prod
|
|
; CHECK: fnmadd {{s[0-9]+}}, {{s[0-9]+}}, {{s[0-9]+}}, {{s[0-9]+}}
|
|
; CHECK-NOFAST-NOT: fnmadd {{s[0-9]+}}, {{s[0-9]+}}, {{s[0-9]+}}, {{s[0-9]+}}
|
|
; CHECK-NOFAST: fmul {{s[0-9]+}}, {{s[0-9]+}}, {{s[0-9]+}}
|
|
; CHECK-NOFAST: fsub {{s[0-9]+}}, {{s[0-9]+}}, {{s[0-9]+}}
|
|
; CHECK-NOFAST: ret
|
|
ret float %diff
|
|
}
|
|
|
|
define float @test_fnmsub_unfused(float %a, float %b, float %c) {
|
|
; CHECK-LABEL: test_fnmsub_unfused:
|
|
; CHECK-NOFAST-LABEL: test_fnmsub_unfused:
|
|
%nega = fsub float -0.0, %a
|
|
%prod = fmul float %b, %c
|
|
%sum = fadd float %nega, %prod
|
|
; CHECK: fnmsub {{s[0-9]+}}, {{s[0-9]+}}, {{s[0-9]+}}, {{s[0-9]+}}
|
|
; CHECK-NOFAST-NOT: fnmsub {{s[0-9]+}}, {{s[0-9]+}}, {{s[0-9]+}}, {{s[0-9]+}}
|
|
; CHECK-NOFAST: fmul {{s[0-9]+}}, {{s[0-9]+}}, {{s[0-9]+}}
|
|
; CHECK-NOFAST: fsub {{s[0-9]+}}, {{s[0-9]+}}, {{s[0-9]+}}
|
|
ret float %sum
|
|
}
|
|
|
|
; Another set of tests that check for multiply single use
|
|
|
|
define float @test_fmadd_unfused_su(float %a, float %b, float %c) {
|
|
; CHECK-LABEL: test_fmadd_unfused_su:
|
|
%prod = fmul float %b, %c
|
|
%sum = fadd float %a, %prod
|
|
%res = fadd float %sum, %prod
|
|
; CHECK-NOT: fmadd {{s[0-9]+}}, {{s[0-9]+}}, {{s[0-9]+}}, {{s[0-9]+}}
|
|
; CHECK: fmul {{s[0-9]+}}, {{s[0-9]+}}, {{s[0-9]+}}
|
|
; CHECK: fadd {{s[0-9]+}}, {{s[0-9]+}}, {{s[0-9]+}}
|
|
; CHECK: fadd {{s[0-9]+}}, {{s[0-9]+}}, {{s[0-9]+}}
|
|
ret float %res
|
|
}
|
|
|
|
define float @test_fmsub_unfused_su(float %a, float %b, float %c) {
|
|
; CHECK-LABEL: test_fmsub_unfused_su:
|
|
%prod = fmul float %b, %c
|
|
%diff = fsub float %a, %prod
|
|
%res = fsub float %diff, %prod
|
|
; CHECK-NOT: fmsub {{s[0-9]+}}, {{s[0-9]+}}, {{s[0-9]+}}, {{s[0-9]+}}
|
|
; CHECK: fmul {{s[0-9]+}}, {{s[0-9]+}}, {{s[0-9]+}}
|
|
; CHECK: fsub {{s[0-9]+}}, {{s[0-9]+}}, {{s[0-9]+}}
|
|
; CHECK: fsub {{s[0-9]+}}, {{s[0-9]+}}, {{s[0-9]+}}
|
|
ret float %res
|
|
}
|
|
|