From 970755e5197afb42a76a24a74cd6dc17721daf50 Mon Sep 17 00:00:00 2001 From: Shuxin Yang Date: Fri, 19 Oct 2012 20:11:16 +0000 Subject: This patch is to fix radar://8426430. It is about llvm support of __builtin_debugtrap() which is supposed to consistently raise SIGTRAP across all systems. In contrast, __builtin_trap() behave differently on different systems. e.g. it raises SIGTRAP on ARM, and SIGILL on X86. The purpose of __builtin_debugtrap() is to consistently provide "trap" functionality, in the mean time preserve the compatibility with on gcc on __builtin_trap(). The X86 backend is already able to handle debugtrap(). This patch is to: 1) make front-end recognize "__builtin_debugtrap()" (emboddied in the one-line change to Clang). 2) In DAG legalization phase, by default, "debugtrap" will be replaced with "trap", which make the __builtin_debugtrap() "available" to all existing ports without the hassle of changing their code. 3) If trap-function is specified (via -trap-func=xyz to llc), both __builtin_debugtrap() and __builtin_trap() will be expanded into the function call of the specified trap function. This behavior may need change in the future. The provided testing-case is to make sure 2) and 3) are working for ARM port, and we already have a testing case for x86. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@166300 91177308-0d34-0410-b5e6-96231b3b80d8 --- include/llvm/Intrinsics.td | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'include/llvm/Intrinsics.td') diff --git a/include/llvm/Intrinsics.td b/include/llvm/Intrinsics.td index 804db49556..5ccfde9e1a 100644 --- a/include/llvm/Intrinsics.td +++ b/include/llvm/Intrinsics.td @@ -420,7 +420,7 @@ def int_flt_rounds : Intrinsic<[llvm_i32_ty]>, GCCBuiltin<"__builtin_flt_rounds">; def int_trap : Intrinsic<[], [], [IntrNoReturn]>, GCCBuiltin<"__builtin_trap">; -def int_debugtrap : Intrinsic<[]>, +def int_debugtrap : Intrinsic<[], [], [IntrNoReturn]>, GCCBuiltin<"__builtin_debugtrap">; // NOP: calls/invokes to this intrinsic are removed by codegen -- cgit v1.2.3