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https://github.com/c64scene-ar/llvm-6502.git
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21fdcb0271
specific code paths.
This allows us to write code like:
if (__nvvm_reflect("FOO"))
// Do something
else
// Do something else
and compile into a library, then give "FOO" a value at kernel
compile-time so the check becomes a no-op.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@178416 91177308-0d34-0410-b5e6-96231b3b80d8
35 lines
1.2 KiB
LLVM
35 lines
1.2 KiB
LLVM
; RUN: opt < %s -S -nvvm-reflect -nvvm-reflect-list USE_MUL=0 -O2 | FileCheck %s --check-prefix=USE_MUL_0
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; RUN: opt < %s -S -nvvm-reflect -nvvm-reflect-list USE_MUL=1 -O2 | FileCheck %s --check-prefix=USE_MUL_1
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@str = private addrspace(4) unnamed_addr constant [8 x i8] c"USE_MUL\00"
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declare i32 @__nvvm_reflect(i8*)
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declare i8* @llvm.nvvm.ptr.constant.to.gen.p0i8.p4i8(i8 addrspace(4)*)
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define float @foo(float %a, float %b) {
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; USE_MUL_0: define float @foo
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; USE_MUL_0-NOT: call i32 @__nvvm_reflect
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; USE_MUL_1: define float @foo
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; USE_MUL_1-NOT: call i32 @__nvvm_reflect
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%ptr = tail call i8* @llvm.nvvm.ptr.constant.to.gen.p0i8.p4i8(i8 addrspace(4)* getelementptr inbounds ([8 x i8] addrspace(4)* @str, i32 0, i32 0))
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%reflect = tail call i32 @__nvvm_reflect(i8* %ptr)
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%cmp = icmp ugt i32 %reflect, 0
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br i1 %cmp, label %use_mul, label %use_add
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use_mul:
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; USE_MUL_1: fmul float %a, %b
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; USE_MUL_0-NOT: fadd float %a, %b
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%ret1 = fmul float %a, %b
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br label %exit
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use_add:
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; USE_MUL_0: fadd float %a, %b
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; USE_MUL_1-NOT: fmul float %a, %b
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%ret2 = fadd float %a, %b
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br label %exit
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exit:
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%ret = phi float [%ret1, %use_mul], [%ret2, %use_add]
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ret float %ret
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}
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