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llvm-project/clang/test/CodeGen/mdouble.c

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[AVR] Add support for the -mdouble=x flag This flag is used by avr-gcc (starting with v10) to set the width of the double type. The double type is by default interpreted as a 32-bit floating point number in avr-gcc instead of a 64-bit floating point number as is common on other architectures. Starting with GCC 10, a new option has been added to control this behavior: https://gcc.gnu.org/wiki/avr-gcc#Deviations_from_the_Standard This commit keeps the default double at 32 bits but adds support for the -mdouble flag (-mdouble=32 and -mdouble=64) to control this behavior. Differential Revision: https://reviews.llvm.org/D76181
2020-03-15 01:55:13 +08:00
// RUN: %clang_cc1 %s -emit-llvm -o - -triple=avr-unknown-unknown -mdouble=64 | \
// RUN: FileCheck --check-prefix=AVR-FP64 %s
// RUN: %clang_cc1 %s -emit-llvm -o - -triple=avr-unknown-unknown -mdouble=32 | \
// RUN: FileCheck --check-prefix=AVR-FP32 %s
double x = 0;
int size = sizeof(x);
// FIXME: the double should have an alignment of 1 on AVR, not 4 or 8.
[test] Add {{.*}} to make ELF tests immune to dso_local/dso_preemptable/(none) differences For a default visibility external linkage definition, dso_local is set for ELF -fno-pic/-fpie and COFF and Mach-O. Since default clang -cc1 for ELF is similar to -fpic ("PIC Level" is not set), this nuance causes unneeded binary format differences. To make emitted IR similar, ELF -cc1 -fpic will default to -fno-semantic-interposition, which sets dso_local for default visibility external linkage definitions. To make this flip smooth and enable future (dso_local as definition default), this patch replaces (function) `define ` with `define{{.*}} `, (variable/constant/alias) `= ` with `={{.*}} `, or inserts appropriate `{{.*}} `.
2020-12-31 16:27:11 +08:00
// AVR-FP64: @x ={{.*}} global double {{.*}}, align 8
// AVR-FP64: @size ={{.*}} global i16 8
// AVR-FP32: @x ={{.*}} global float {{.*}}, align 4
// AVR-FP32: @size ={{.*}} global i16 4