8c26ea663d
Currently, when there is a global register variable in a program that
is bound to an invalid register, clang/llvm prints an error message that
is not very user-friendly.
This commit improves the diagnostic and moves the check that used to be
in the backend to Sema. In addition, it makes changes to error out if
the size of the register doesn't match the declared variable size.
e.g., volatile register int B asm ("rbp");
rdar://problem/23084219
Differential Revision: http://reviews.llvm.org/D13834
llvm-svn: 253405
40 lines
1.5 KiB
Plaintext
40 lines
1.5 KiB
Plaintext
// REQUIRES: x86-registered-target
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// REQUIRES: nvptx-registered-target
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// RUN: %clang_cc1 -triple nvptx-unknown-cuda -fsyntax-only -fcuda-is-device -verify %s
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// RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -fsyntax-only -verify %s
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__attribute__((device)) register long global_dev_reg asm("r0");
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__attribute__((device)) register long
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global_dev_hreg asm("rsp"); // device-side error
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register long global_host_reg asm("rsp");
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register long global_host_dreg asm("r0"); // host-side error
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__attribute__((device)) void df() {
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register long local_dev_reg asm("r0");
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register long local_host_reg asm("rsp"); // device-side error
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short h;
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// asm with PTX constraints. Some of them are PTX-specific.
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__asm__("dont care" : "=h"(h) : "f"(0.0), "d"(0.0), "h"(0), "r"(0), "l"(0));
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}
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void hf() {
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register long local_dev_reg asm("r0"); // host-side error
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register long local_host_reg asm("rsp");
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int a;
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// Asm with x86 constraints and registers that are not supported by PTX.
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__asm__("dont care" : "=a"(a) : "a"(0), "b"(0), "c"(0) : "flags");
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}
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// Check errors in named register variables.
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// We should only see errors relevant to current compilation mode.
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#if defined(__CUDA_ARCH__)
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// Device-side compilation:
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// expected-error@8 {{unknown register name 'rsp' in asm}}
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// expected-error@15 {{unknown register name 'rsp' in asm}}
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#else
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// Host-side compilation:
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// expected-error@11 {{unknown register name 'r0' in asm}}
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// expected-error@22 {{unknown register name 'r0' in asm}}
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#endif
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