From 4dc0b1ac60f947c23bbb0e20a7efb636c214b0a8 Mon Sep 17 00:00:00 2001 From: Reid Kleckner Date: Thu, 1 Nov 2018 19:54:45 +0000 Subject: Fix clang -Wimplicit-fallthrough warnings across llvm, NFC This patch should not introduce any behavior changes. It consists of mostly one of two changes: 1. Replacing fall through comments with the LLVM_FALLTHROUGH macro 2. Inserting 'break' before falling through into a case block consisting of only 'break'. We were already using this warning with GCC, but its warning behaves slightly differently. In this patch, the following differences are relevant: 1. GCC recognizes comments that say "fall through" as annotations, clang doesn't 2. GCC doesn't warn on "case N: foo(); default: break;", clang does 3. GCC doesn't warn when the case contains a switch, but falls through the outer case. I will enable the warning separately in a follow-up patch so that it can be cleanly reverted if necessary. Reviewers: alexfh, rsmith, lattner, rtrieu, EricWF, bollu Differential Revision: https://reviews.llvm.org/D53950 llvm-svn: 345882 --- llvm/lib/Target/AMDGPU/AMDGPURegisterBankInfo.cpp | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'llvm/lib/Target/AMDGPU/AMDGPURegisterBankInfo.cpp') diff --git a/llvm/lib/Target/AMDGPU/AMDGPURegisterBankInfo.cpp b/llvm/lib/Target/AMDGPU/AMDGPURegisterBankInfo.cpp index 8314b4a490f..05b714f924b 100644 --- a/llvm/lib/Target/AMDGPU/AMDGPURegisterBankInfo.cpp +++ b/llvm/lib/Target/AMDGPU/AMDGPURegisterBankInfo.cpp @@ -351,7 +351,7 @@ AMDGPURegisterBankInfo::getInstrMapping(const MachineInstr &MI) const { case AMDGPU::G_SHL: if (isSALUMapping(MI)) return getDefaultMappingSOP(MI); - // Fall-through + LLVM_FALLTHROUGH; case AMDGPU::G_FADD: case AMDGPU::G_FPTOSI: -- cgit v1.2.3