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https://github.com/RPCS3/llvm.git
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712cf3fb41
Summary:
while investigating performance degradation of imagick benchmark
there were found inefficient pattern for UINT_TO_FP conversion.
That pattern causes RAW hazard in assembly code. Specifically,
uitofp IR operator results in poor assembler :
st %i0, [%fp - 952]
ldd [%fp - 952], %f0
it stores 32-bit integer register into memory location and then
loads 64-bit floating point data from that location.
That is exactly RAW hazard case. To optimize that case it is
possible to use SPISD::ITOF and SPISD::XTOF for conversion from
integer to floating point data type and to use ISD::BITCAST to
copy from integer register into floating point register.
The fix is to write custom UINT_TO_FP pattern using SPISD::ITOF,
SPISD::XTOF, ISD::BITCAST.
Patch by Alexey Lapshin
Reviewers: fedor.sergeev, jyknight, dcederman, lero_chris
Reviewed By: jyknight
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D36875
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@318704 91177308-0d34-0410-b5e6-96231b3b80d8
302 lines
7.1 KiB
LLVM
302 lines
7.1 KiB
LLVM
; RUN: llc -march=sparc < %s | FileCheck %s -check-prefix=V8 -check-prefix=V8-BE
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; RUN: llc -march=sparcel < %s | FileCheck %s -check-prefix=V8 -check-prefix=V8-EL
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; RUN: llc -march=sparc -O0 < %s | FileCheck %s -check-prefix=V8-UNOPT
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; RUN: llc -march=sparc -mattr=v9 < %s | FileCheck %s -check-prefix=V9
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; RUN: llc -mtriple=sparc64-unknown-linux < %s | FileCheck %s -check-prefix=SPARC64
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; RUN: llc -march=sparc -mcpu=niagara4 < %s | FileCheck %s -check-prefix=VIS3
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; RUN: llc -march=sparcv9 -mcpu=niagara4 < %s | FileCheck %s -check-prefix=VIS3-64
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; V8-LABEL: test_neg:
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; V8: call get_double
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; V8-BE: fnegs %f0, %f0
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; V8-EL: fnegs %f1, %f1
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; V8-UNOPT-LABEL: test_neg:
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; V8-UNOPT: fnegs
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; V8-UNOPT: ! implicit-def
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; V8-UNOPT: fmovs {{.+}}, %f0
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; V8-UNOPT: fmovs {{.+}}, %f1
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; V9-LABEL: test_neg:
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; V9: fnegd %f0, %f0
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; SPARC64-LABEL: test_neg:
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; SPARC64: fnegd %f0, %f0
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define double @test_neg() {
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entry:
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%0 = tail call double @get_double()
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%1 = fsub double -0.000000e+00, %0
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ret double %1
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}
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; V8-LABEL: test_abs:
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; V8-BE: fabss %f0, %f0
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; V8-EL: fabss %f1, %f1
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; V8-UNOPT-LABEL: test_abs:
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; V8-UNOPT: fabss
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; V8-UNOPT: ! implicit-def
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; V8-UNOPT: fmovs {{.+}}, %f0
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; V8-UNOPT: fmovs {{.+}}, %f1
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; V9-LABEL: test_abs:
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; V9: fabsd %f0, %f0
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; SPARC64-LABEL: test_abs:
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; SPARC64: fabsd %f0, %f0
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define double @test_abs() {
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entry:
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%0 = tail call double @get_double()
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%1 = tail call double @llvm.fabs.f64(double %0)
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ret double %1
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}
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declare double @get_double()
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declare double @llvm.fabs.f64(double) nounwind readonly
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; V8-LABEL: test_v9_floatreg:
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; V8: fsubd {{.+}}, {{.+}}, [[R:%f(((1|2)?(0|2|4|6|8))|30)]]
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; V8: std [[R]], [%{{.+}}]
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; V8: ldd [%{{.+}}], %f0
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; V8: faddd {{.+}}, {{.+}}, {{.+}}
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; V9-LABEL: test_v9_floatreg:
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; V9: fsubd {{.+}}, {{.+}}, {{.+}}
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; V9: faddd {{.+}}, {{.+}}, %f0
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; SPARC64-LABEL: test_v9_floatreg:
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; SPARC64: fsubd {{.+}}, {{.+}}, {{.+}}
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; SPARC64: faddd {{.+}}, {{.+}}, %f0
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define double @test_v9_floatreg() {
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entry:
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%0 = tail call double @get_double()
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%1 = tail call double @get_double()
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%2 = fsub double %0, %1
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tail call void asm sideeffect "", "~{f0},~{f2},~{f3},~{f4},~{f5},~{f6},~{f7},~{f8},~{f9},~{f10},~{f11},~{f12},~{f13},~{f14},~{f15},~{f16},~{f17},~{f18},~{f19},~{f20},~{f21},~{f22},~{f23},~{f24},~{f25},~{f26},~{f27},~{f28},~{f29},~{f30},~{f31}"()
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%3 = fadd double %2, %2
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ret double %3
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}
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; V8-LABEL: test_xtos_stox
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; V8: call __floatdisf
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; V8: call __fixsfdi
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; V9-LABEL: test_xtos_stox
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; V9: call __floatdisf
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; V9: call __fixsfdi
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; SPARC64-LABEL: test_xtos_stox
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; SPARC64: fxtos
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; SPARC64: fstox
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define void @test_xtos_stox(i64 %a, i64* %ptr0, float* %ptr1) {
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entry:
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%0 = sitofp i64 %a to float
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store float %0, float* %ptr1, align 8
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%1 = fptosi float %0 to i64
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store i64 %1, i64* %ptr0, align 8
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ret void
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}
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; V8-LABEL: test_itos_stoi
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; V8: fitos
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; V8: fstoi
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; V9-LABEL: test_itos_stoi
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; V9: fitos
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; V9: fstoi
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; SPARC64-LABEL: test_itos_stoi
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; SPARC64: fitos
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; SPARC64: fstoi
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define void @test_itos_stoi(i32 %a, i32* %ptr0, float* %ptr1) {
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entry:
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%0 = sitofp i32 %a to float
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store float %0, float* %ptr1, align 8
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%1 = fptosi float %0 to i32
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store i32 %1, i32* %ptr0, align 8
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ret void
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}
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; V8-LABEL: test_xtod_dtox
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; V8: call __floatdidf
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; V8: call __fixdfdi
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; V9-LABEL: test_xtod_dtox
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; V9: call __floatdidf
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; V9: call __fixdfdi
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; SPARC64-LABEL: test_xtod_dtox
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; SPARC64: fxtod
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; SPARC64: fdtox
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define void @test_xtod_dtox(i64 %a, i64* %ptr0, double* %ptr1) {
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entry:
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%0 = sitofp i64 %a to double
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store double %0, double* %ptr1, align 8
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%1 = fptosi double %0 to i64
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store i64 %1, i64* %ptr0, align 8
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ret void
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}
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; V8-LABEL: test_itod_dtoi
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; V8: fitod
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; V8: fdtoi
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; V9-LABEL: test_itod_dtoi
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; V9: fitod
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; V9: fdtoi
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; SPARC64-LABEL: test_itod_dtoi
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; SPARC64: fitod
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; SPARC64: fdtoi
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define void @test_itod_dtoi(i32 %a, double %b, i32* %ptr0, double* %ptr1) {
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entry:
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%0 = sitofp i32 %a to double
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store double %0, double* %ptr1, align 8
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%1 = fptosi double %b to i32
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store i32 %1, i32* %ptr0, align 8
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ret void
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}
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; V8-LABEL: test_uxtos_stoux
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; V8: call __floatundisf
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; V8: call __fixunssfdi
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; V9-LABEL: test_uxtos_stoux
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; V9: call __floatundisf
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; V9: call __fixunssfdi
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; SPARC64-LABEL: test_uxtos_stoux
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; SPARC64-NOT: call __floatundisf
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; SPARC64-NOT: call __fixunssfdi
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define void @test_uxtos_stoux(i64 %a, i64* %ptr0, float* %ptr1) {
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entry:
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%0 = uitofp i64 %a to float
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store float %0, float* %ptr1, align 8
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%1 = fptoui float %0 to i64
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store i64 %1, i64* %ptr0, align 8
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ret void
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}
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; V8-LABEL: test_utos_stou
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; V8: fdtos
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; V8: fstoi
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; V9-LABEL: test_utos_stou
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; V9: fdtos
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; V9: fstoi
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; SPARC64-LABEL: test_utos_stou
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; SPARC64: fxtos
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; SPARC64: fstoi
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define void @test_utos_stou(i32 %a, i32* %ptr0, float* %ptr1) {
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entry:
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%0 = uitofp i32 %a to float
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store float %0, float* %ptr1, align 8
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%1 = fptoui float %0 to i32
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store i32 %1, i32* %ptr0, align 8
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ret void
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}
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; V8-LABEL: test_uxtod_dtoux
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; V8: call __floatundidf
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; V8: call __fixunsdfdi
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; V9-LABEL: test_uxtod_dtoux
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; V9: call __floatundidf
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; V9: call __fixunsdfdi
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; SPARC64-LABEL: test_uxtod_dtoux
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; SPARC64-NOT: call __floatundidf
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; SPARC64-NOT: call __floatunsdfdi
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define void @test_uxtod_dtoux(i64 %a, i64* %ptr0, double* %ptr1) {
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entry:
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%0 = uitofp i64 %a to double
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store double %0, double* %ptr1, align 8
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%1 = fptoui double %0 to i64
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store i64 %1, i64* %ptr0, align 8
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ret void
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}
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; V8-LABEL: test_utod_dtou
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; V8-NOT: fitod
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; V8: fdtoi
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; V9-LABEL: test_utod_dtou
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; V9-NOT: fitod
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; V9: fdtoi
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; SPARC64-LABEL: test_utod_dtou
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; SPARC64-NOT: fitod
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; SPARC64: fdtoi
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; VIS3-64-LABEL: test_utod_dtou
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; VIS3-64: movxtod
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define void @test_utod_dtou(i32 %a, double %b, i32* %ptr0, double* %ptr1) {
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entry:
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%0 = uitofp i32 %a to double
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store double %0, double* %ptr1, align 8
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%1 = fptoui double %b to i32
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store i32 %1, i32* %ptr0, align 8
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ret void
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}
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; V8-LABEL: test_ustod
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; V8: fitod
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; VIS3-LABEL: test_ustod
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; VIS3: movwtos
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define double @test_ustod(i16 zeroext) {
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%2 = uitofp i16 %0 to double
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ret double %2
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}
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; V8-LABEL: test_ustos
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; V8: fitos
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; VIS3-LABEL: test_ustos
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; VIS3: movwtos
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define float @test_ustos(i16 zeroext) {
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%2 = uitofp i16 %0 to float
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ret float %2
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}
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; check for movwtos used for bitcast
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;
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; VIS3-LABEL: test_bitcast_utos
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; VIS3:movwtos
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define float @test_bitcast_utos(i32 ) {
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%2 = bitcast i32 %0 to float
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ret float %2
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}
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; check for movxtod used for bitcast
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;
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; VIS3-64-LABEL: test_bitcast_uxtod
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; VIS3-64:movxtod
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define double @test_bitcast_uxtod(i64 ) {
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%2 = bitcast i64 %0 to double
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ret double %2
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}
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