[PowerPC] Support -mno-red-zone option (#94581)

ecnelises · web-flow · commit b6d1df2afd0a · 2024-08-19T17:58:08.000+08:00
diff --git a/clang/lib/Driver/ToolChains/Clang.cpp b/clang/lib/Driver/ToolChains/Clang.cpp
@@ -2104,6 +2104,9 @@ void Clang::AddPPCTargetArgs(const ArgList &Args,
     CmdArgs.push_back("-mabi=vec-extabi");
   }
 
+  if (!Args.hasFlag(options::OPT_mred_zone, options::OPT_mno_red_zone, true))
+    CmdArgs.push_back("-disable-red-zone");
+
   ppc::FloatABI FloatABI = ppc::getPPCFloatABI(D, Args);
   if (FloatABI == ppc::FloatABI::Soft) {
     // Floating point operations and argument passing are soft.
diff --git a/clang/test/Driver/flags.c b/clang/test/Driver/flags.c
@@ -33,3 +33,6 @@
 //
 // RUN: %clang --target=riscv64 -### -S -mno-implicit-float %s 2>&1 | FileCheck -check-prefix=TEST11 %s
 // TEST11: "-no-implicit-float"
+//
+// RUN: %clang --target=ppc64le -### -S -mno-red-zone %s 2>&1 | FileCheck -check-prefix=TEST12 %s
+// TEST12: "-disable-red-zone"
diff --git a/llvm/test/CodeGen/PowerPC/noredzone.ll b/llvm/test/CodeGen/PowerPC/noredzone.ll

Original file line number	Diff line number	Diff line change
`@@ -2104,6 +2104,9 @@ void Clang::AddPPCTargetArgs(const ArgList &Args,`
`2104`	`2104`	`CmdArgs.push_back("-mabi=vec-extabi");`
`2105`	`2105`	`}`
`2106`	`2106`
	`2107`	`+ if (!Args.hasFlag(options::OPT_mred_zone, options::OPT_mno_red_zone, true))`
	`2108`	`+ CmdArgs.push_back("-disable-red-zone");`
	`2109`	`+`
`2107`	`2110`	`ppc::FloatABI FloatABI = ppc::getPPCFloatABI(D, Args);`
`2108`	`2111`	`if (FloatABI == ppc::FloatABI::Soft) {`
`2109`	`2112`	`// Floating point operations and argument passing are soft.`