1f82d9ba6e
This commit increases the number of sections and overall output size of .o files by 10% and sometimes a bit more. This alone is challenging for some users, but it also appears to trigger an as-yet unexplained behavior in the Gold linker where the memory usage increases considerably more than 10% (we think). The increase is also frustrating because in many (if not all) cases we end up with almost all of the growth coming from the ELF overhead of -ffunction-sections and such, not from actual extra code being emitted. Richard Smith and Eric Christopher are both going to investigate this and try to get to the bottom of what is triggering this and whether the kinds of increases here are sustainable or what options we might have to minimize the impact they have. However, this is currently breaking a pretty large number of our users' builds so reverting it while we sort out how to make progress here. I've seen a longer and more detailed update to the commit thread. llvm-svn: 338209
150 lines
4.9 KiB
C++
150 lines
4.9 KiB
C++
// RUN: %clang -std=c++11 --target=aarch64-arm--eabi -S -emit-llvm %s -o - | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-AARCH64
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// RUN: %clang -std=c++11 --target=x86_64 -S -emit-llvm %s -o - | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-X86
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/* Various contexts where type _Float16 can appear. */
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/* Namespace */
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namespace {
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_Float16 f1n;
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// CHECK-DAG: @_ZN12_GLOBAL__N_13f1nE = internal global half 0xH0000, align 2
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_Float16 f2n = 33.f16;
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// CHECK-DAG: @_ZN12_GLOBAL__N_13f2nE = internal global half 0xH5020, align 2
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_Float16 arr1n[10];
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// CHECK-AARCH64-DAG: @_ZN12_GLOBAL__N_15arr1nE = internal global [10 x half] zeroinitializer, align 2
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// CHECK-X86-DAG: @_ZN12_GLOBAL__N_15arr1nE = internal global [10 x half] zeroinitializer, align 16
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_Float16 arr2n[] = { 1.2, 3.0, 3.e4 };
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// CHECK-DAG: @_ZN12_GLOBAL__N_15arr2nE = internal global [3 x half] [half 0xH3CCD, half 0xH4200, half 0xH7753], align 2
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const volatile _Float16 func1n(const _Float16 &arg) {
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return arg + f2n + arr1n[4] - arr2n[1];
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}
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}
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/* File */
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_Float16 f1f;
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// CHECK-AARCH64-DAG: @f1f = dso_local global half 0xH0000, align 2
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// CHECK-X86-DAG: @f1f = dso_local global half 0xH0000, align 2
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_Float16 f2f = 32.4;
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// CHECK-DAG: @f2f = dso_local global half 0xH500D, align 2
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_Float16 arr1f[10];
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// CHECK-AARCH64-DAG: @arr1f = dso_local global [10 x half] zeroinitializer, align 2
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// CHECK-X86-DAG: @arr1f = dso_local global [10 x half] zeroinitializer, align 16
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_Float16 arr2f[] = { -1.2, -3.0, -3.e4 };
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// CHECK-DAG: @arr2f = dso_local global [3 x half] [half 0xHBCCD, half 0xHC200, half 0xHF753], align 2
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_Float16 func1f(_Float16 arg);
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/* Class */
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class C1 {
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_Float16 f1c;
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static const _Float16 f2c;
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// CHECK-DAG: @_ZN2C13f2cE = external dso_local constant half, align 2
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volatile _Float16 f3c;
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public:
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C1(_Float16 arg) : f1c(arg), f3c(arg) { }
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// Check that we mangle _Float16 to DF16_
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// CHECK-DAG: define linkonce_odr dso_local void @_ZN2C1C2EDF16_(%class.C1*{{.*}}, half{{.*}})
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_Float16 func1c(_Float16 arg ) {
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return f1c + arg;
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}
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// CHECK-DAG: define linkonce_odr dso_local half @_ZN2C16func1cEDF16_(%class.C1*{{.*}}, half{{.*}})
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static _Float16 func2c(_Float16 arg) {
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return arg * C1::f2c;
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}
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// CHECK-DAG: define linkonce_odr dso_local half @_ZN2C16func2cEDF16_(half{{.*}})
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};
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/* Template */
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template <class C> C func1t(C arg) {
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return arg * 2.f16;
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}
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// CHECK-DAG: define linkonce_odr dso_local half @_Z6func1tIDF16_ET_S0_(half{{.*}})
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template <class C> struct S1 {
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C mem1;
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};
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template <> struct S1<_Float16> {
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_Float16 mem2;
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};
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/* Local */
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extern int printf (const char *__restrict __format, ...);
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int main(void) {
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_Float16 f1l = 1e3f16;
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// CHECK-DAG: store half 0xH63D0, half* %{{.*}}, align 2
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_Float16 f2l = -0.f16;
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// CHECK-DAG: store half 0xH8000, half* %{{.*}}, align 2
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_Float16 f3l = 1.000976562;
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// CHECK-DAG: store half 0xH3C01, half* %{{.*}}, align 2
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C1 c1(f1l);
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// CHECK-DAG: [[F1L:%[a-z0-9]+]] = load half, half* %{{.*}}, align 2
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// CHECK-DAG: call void @_ZN2C1C2EDF16_(%class.C1* %{{.*}}, half %{{.*}})
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S1<_Float16> s1 = { 132.f16 };
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// CHECK-DAG: @_ZZ4mainE2s1 = private unnamed_addr constant %struct.S1 { half 0xH5820 }, align 2
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// CHECK-DAG: [[S1:%[0-9]+]] = bitcast %struct.S1* %{{.*}} to i8*
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// CHECK-DAG: call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 2 [[S1]], i8* align 2 bitcast (%struct.S1* @_ZZ4mainE2s1 to i8*), i64 2, i1 false)
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_Float16 f4l = func1n(f1l) + func1f(f2l) + c1.func1c(f3l) + c1.func2c(f1l) +
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func1t(f1l) + s1.mem2 - f1n + f2n;
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auto f5l = -1.f16, *f6l = &f2l, f7l = func1t(f3l);
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// CHECK-DAG: store half 0xHBC00, half* %{{.*}}, align 2
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// CHECK-DAG: store half* %{{.*}}, half** %{{.*}}, align 8
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_Float16 f8l = f4l++;
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// CHECK-DAG: %{{.*}} = load half, half* %{{.*}}, align 2
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// CHECK-DAG: [[INC:%[a-z0-9]+]] = fadd half {{.*}}, 0xH3C00
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// CHECK-DAG: store half [[INC]], half* %{{.*}}, align 2
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_Float16 arr1l[] = { -1.f16, -0.f16, -11.f16 };
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// CHECK-DAG: @_ZZ4mainE5arr1l = private unnamed_addr constant [3 x half] [half 0xHBC00, half 0xH8000, half 0xHC980], align 2
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float cvtf = f2n;
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//CHECK-DAG: [[H2F:%[a-z0-9]+]] = fpext half {{%[0-9]+}} to float
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//CHECK-DAG: store float [[H2F]], float* %{{.*}}, align 4
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double cvtd = f2n;
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//CHECK-DAG: [[H2D:%[a-z0-9]+]] = fpext half {{%[0-9]+}} to double
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//CHECK-DAG: store double [[H2D]], double* %{{.*}}, align 8
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long double cvtld = f2n;
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//CHECK-AARCh64-DAG: [[H2LD:%[a-z0-9]+]] = fpext half {{%[0-9]+}} to fp128
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//CHECK-AARCh64-DAG: store fp128 [[H2LD]], fp128* %{{.*}}, align 16
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//CHECK-X86-DAG: [[H2LD:%[a-z0-9]+]] = fpext half {{%[0-9]+}} to x86_fp80
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//CHECK-X86-DAG: store x86_fp80 [[H2LD]], x86_fp80* %{{.*}}, align 16
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_Float16 f2h = 42.0f;
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//CHECK-DAG: store half 0xH5140, half* %{{.*}}, align 2
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_Float16 d2h = 42.0;
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//CHECK-DAG: store half 0xH5140, half* %{{.*}}, align 2
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_Float16 ld2h = 42.0l;
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//CHECK-DAG:store half 0xH5140, half* %{{.*}}, align 2
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}
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