From 09d51a841dcfbc41c3d7f3274b109b5f9fb09bb0 Mon Sep 17 00:00:00 2001 From: "Felix (Ting Wang)" Date: Fri, 12 Apr 2024 08:18:01 +0800 Subject: [PowerPC][AIX] Enable aix-small-local-dynamic-tls target attribute (#86641) Following the aix-small-local-exec-tls target attribute, this patch adds a target attribute for an AIX-specific option in llc that informs the compiler that it can use a faster access sequence for the local-dynamic TLS model (formally named aix-small-local-dynamic-tls) when TLS variables are less than ~32KB in size. The patch either produces an addi/la with a displacement off of module handle (return value from .__tls_get_mod) when the address is calculated, or it produces an addi/la followed by a load/store when the address is calculated and used for further accesses. --------- Co-authored-by: Amy Kwan --- llvm/lib/Target/PowerPC/PPCSubtarget.cpp | 26 +++++++++++++------------- 1 file changed, 13 insertions(+), 13 deletions(-) (limited to 'llvm/lib/Target/PowerPC/PPCSubtarget.cpp') diff --git a/llvm/lib/Target/PowerPC/PPCSubtarget.cpp b/llvm/lib/Target/PowerPC/PPCSubtarget.cpp index 653d9bd..d172255 100644 --- a/llvm/lib/Target/PowerPC/PPCSubtarget.cpp +++ b/llvm/lib/Target/PowerPC/PPCSubtarget.cpp @@ -124,22 +124,22 @@ void PPCSubtarget::initSubtargetFeatures(StringRef CPU, StringRef TuneCPU, // Determine endianness. IsLittleEndian = TM.isLittleEndian(); - if (HasAIXSmallLocalExecTLS) { + if (HasAIXSmallLocalExecTLS || HasAIXSmallLocalDynamicTLS) { if (!TargetTriple.isOSAIX() || !IsPPC64) - report_fatal_error( - "The aix-small-local-exec-tls attribute is only supported on AIX in " - "64-bit mode.\n", - false); - // The aix-small-local-exec-tls attribute should only be used with + report_fatal_error("The aix-small-local-[exec|dynamic]-tls attribute is " + "only supported on AIX in " + "64-bit mode.\n", + false); + // The aix-small-local-[exec|dynamic]-tls attribute should only be used with // -data-sections, as having data sections turned off with this option - // is not ideal for performance. Moreover, the small-local-exec-tls region - // is a limited resource, and should not be used for variables that may - // be replaced. + // is not ideal for performance. Moreover, the + // small-local-[exec|dynamic]-tls region is a limited resource, and should + // not be used for variables that may be replaced. if (!TM.getDataSections()) - report_fatal_error( - "The aix-small-local-exec-tls attribute can only be specified with " - "-data-sections.\n", - false); + report_fatal_error("The aix-small-local-[exec|dynamic]-tls attribute can " + "only be specified with " + "-data-sections.\n", + false); } } -- cgit v1.1