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20 lines
728 B
D
20 lines
728 B
D
// Tests the @ldc.attributes.llvmFastMathFlag("contract") UDA
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// Also tests that adding this attribute indeed leads to LLVM optimizing it to a fused multiply-add for a simple case.
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// REQUIRES: atleast_llvm500, target_X86
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// RUN: %ldc -c -output-ll -of=%t.ll %s && FileCheck %s --check-prefix LLVM < %t.ll
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// RUN: %ldc -betterC -mtriple=x86_64-linux-gnu -mattr=+fma -O3 -release -c -output-s -of=%t.s %s && FileCheck %s --check-prefix ASM < %t.s
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import ldc.attributes;
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// LLVM-LABEL: define{{.*}} @{{.*}}contract
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// ASM-LABEL: contract:
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@llvmFastMathFlag("contract")
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extern(C) double contract(double a, double b, double c)
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{
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// LLVM: fmul contract double
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// LLVM: fadd contract double
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// ASM: vfmadd
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return a * b + c;
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}
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