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llvm-project/clang/test/CodeGen/ffp-contract-fast-option.cpp

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Set FMF for -ffp-contract=fast With this, FMF(contract) becomes an alternative way to express the request to contract. These are currently only propagated for FMul, FAdd and FSub. The rest will be added as more FMFs are hooked up for this. This is toward fixing PR25721. Differential Revision: https://reviews.llvm.org/D31168 llvm-svn: 299469
2017-04-05 05:18:30 +08:00
// RUN: %clang_cc1 -O3 -ffp-contract=fast -triple %itanium_abi_triple -emit-llvm -o - %s | FileCheck %s
float fp_contract_1(float a, float b, float c) {
// CHECK-LABEL: fp_contract_1fff(
// CHECK: fmul contract float
// CHECK: fadd contract float
return a * b + c;
}
float fp_contract_2(float a, float b, float c) {
// CHECK-LABEL: fp_contract_2fff(
// CHECK: fmul contract float
// CHECK: fsub contract float
return a * b - c;
}
void fp_contract_3(float *a, float b, float c) {
// CHECK-LABEL: fp_contract_3Pfff(
// CHECK: fmul contract float
// CHECK: fadd contract float
a[0] += b * c;
}
void fp_contract_4(float *a, float b, float c) {
// CHECK-LABEL: fp_contract_4Pfff(
// CHECK: fmul contract float
// CHECK: fsub contract float
a[0] -= b * c;
}