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llvm-project/llvm/test/CodeGen/NVPTX/libcall-instruction.ll

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[NVPTX] Lower instructions that expand into libcalls. The change is an effort to split and refactor abandoned D34708 into smaller parts. Here the behaviour of unsupported instructions is changed to match the behaviour of explicit intrinsics calls. Currently LLVM crashes with: > Assertion getInstruction() && "Not a call or invoke instruction!" failed. With this patch LLVM produces a more sensible error message: > Cannot select: ... i32 = ExternalSymbol'__foobar' Author: Denys Zariaiev <denys.zariaiev@gmail.com> Differential Revision: https://reviews.llvm.org/D55145 llvm-svn: 349213
2018-12-15 07:53:06 +08:00
; RUN: not llc < %s -march=nvptx 2>&1 | FileCheck %s
[NVPTX] Allow libcalls that are defined in the current module. The patch adds a possibility to make library calls on NVPTX. An important thing about library functions - they must be defined within the current module. This basically should guarantee that we produce a valid PTX assembly (without calls to not defined functions). The one who wants to use the libcalls is probably will have to link against compiler-rt or any other implementation. Currently, it's completely impossible to make library calls because of error LLVM ERROR: Cannot select: i32 = ExternalSymbol '...'. But we can lower ExternalSymbol to TargetExternalSymbol and verify if the function definition is available. Also, there was an issue with a DAG during legalisation. When we expand instruction into libcall, the inner call-chain isn't being "integrated" into outer chain. Since the last "data-flow" (call retval load) node is located in call-chain earlier than CALLSEQ_END node, the latter becomes a leaf and therefore a dead node (and is being removed quite fast). Proposed here solution relies on another data-flow pseudo nodes (ProxyReg) which purpose is only to keep CALLSEQ_END at legalisation and instruction selection phases - we remove the pseudo instructions before register scheduling phase. Patch by Denys Zariaiev! Differential Revision: https://reviews.llvm.org/D34708 llvm-svn: 350069
2018-12-27 03:12:31 +08:00
; used to panic on failed assertion and now fails with an "Undefined external symbol"
[NVPTX] Lower instructions that expand into libcalls. The change is an effort to split and refactor abandoned D34708 into smaller parts. Here the behaviour of unsupported instructions is changed to match the behaviour of explicit intrinsics calls. Currently LLVM crashes with: > Assertion getInstruction() && "Not a call or invoke instruction!" failed. With this patch LLVM produces a more sensible error message: > Cannot select: ... i32 = ExternalSymbol'__foobar' Author: Denys Zariaiev <denys.zariaiev@gmail.com> Differential Revision: https://reviews.llvm.org/D55145 llvm-svn: 349213
2018-12-15 07:53:06 +08:00
[NVPTX] Allow libcalls that are defined in the current module. The patch adds a possibility to make library calls on NVPTX. An important thing about library functions - they must be defined within the current module. This basically should guarantee that we produce a valid PTX assembly (without calls to not defined functions). The one who wants to use the libcalls is probably will have to link against compiler-rt or any other implementation. Currently, it's completely impossible to make library calls because of error LLVM ERROR: Cannot select: i32 = ExternalSymbol '...'. But we can lower ExternalSymbol to TargetExternalSymbol and verify if the function definition is available. Also, there was an issue with a DAG during legalisation. When we expand instruction into libcall, the inner call-chain isn't being "integrated" into outer chain. Since the last "data-flow" (call retval load) node is located in call-chain earlier than CALLSEQ_END node, the latter becomes a leaf and therefore a dead node (and is being removed quite fast). Proposed here solution relies on another data-flow pseudo nodes (ProxyReg) which purpose is only to keep CALLSEQ_END at legalisation and instruction selection phases - we remove the pseudo instructions before register scheduling phase. Patch by Denys Zariaiev! Differential Revision: https://reviews.llvm.org/D34708 llvm-svn: 350069
2018-12-27 03:12:31 +08:00
; CHECK: LLVM ERROR: Undefined external symbol "__umodti3"
[NVPTX] Lower instructions that expand into libcalls. The change is an effort to split and refactor abandoned D34708 into smaller parts. Here the behaviour of unsupported instructions is changed to match the behaviour of explicit intrinsics calls. Currently LLVM crashes with: > Assertion getInstruction() && "Not a call or invoke instruction!" failed. With this patch LLVM produces a more sensible error message: > Cannot select: ... i32 = ExternalSymbol'__foobar' Author: Denys Zariaiev <denys.zariaiev@gmail.com> Differential Revision: https://reviews.llvm.org/D55145 llvm-svn: 349213
2018-12-15 07:53:06 +08:00
define hidden i128 @remainder(i128, i128) {
%3 = urem i128 %0, %1
ret i128 %3
}