[clang] [llvm] [AIX][TOC] Add -mtocdata/-mno-tocdata options on AIX (PR #67999)

[Zaara Syeda via cfe-commits]

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@@ -0,0 +1,69 @@
+// REQUIRES: powerpc-registered-target
+// RUN: %clang_cc1 %s -triple=powerpc-ibm-aix-xcoff -S -mtocdata=h,g,f,e,d,c,b,a,globalOneWithAlias,globalTwoWithAlias,ll,t3 -verify -emit-llvm -o - | FileCheck %s -check-prefix=CHECK --match-full-lines
+// RUN: %clang_cc1 %s -triple=powerpc-ibm-aix-xcoff -S -mtocdata -verify=none -emit-llvm -o - | FileCheck %s -check-prefix=CHECK --match-full-lines
+
+// none-no-diagnostics
+
+struct large_struct {
+  int x;
+  short y;
+  short z;
+  char c;
+};
+
+struct large_struct a;                      // expected-warning {{-mtocdata option is ignored for a because variable is larger than a pointer}}
+long long b = 5;                            // expected-warning {{-mtocdata option is ignored for b because variable is larger than a pointer}}
+int __attribute__((aligned(128))) c = 0;    // expected-warning {{-mtocdata option is ignored for c because variable is aligned wider than a pointer}}
+double d = 2.5;                             // expected-warning {{-mtocdata option is ignored for d because variable is larger than a pointer}}
+int e __attribute__((section("foo"))) = 10; // expected-warning {{-mtocdata option is ignored for e because of a section attribute}}
+__thread int f;                             // expected-warning {{-mtocdata option is ignored for f because of thread local storage}}
+
+struct SomeStruct;
+extern struct SomeStruct g;                 // expected-warning {{-mtocdata option is ignored for g because of incomplete type}}
+
+extern int h[];                             // expected-warning {{-mtocdata option is ignored for h because of incomplete type}}
+
+struct ty3 {
+  int A;
+  char C[];
+};
+struct ty3 t3 = { 4, "fo" }; // expected-warning {{-mtocdata option is ignored for t3 because it contains a flexible array member}}
+
+int globalOneWithAlias = 10;
+__attribute__((__alias__("globalOneWithAlias"))) extern int aliasOne; // expected-warning {{-mtocdata option is ignored for globalOneWithAlias because the variable has an alias}}
+__attribute__((__alias__("globalTwoWithAlias"))) extern int aliasTwo; // expected-warning {{-mtocdata option is ignored for globalTwoWithAlias because the variable has an alias}}
+int globalTwoWithAlias = 20;
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syzaara wrote:

I was just testing the cases where the global is defined before the alias versus after the alias.

https://github.com/llvm/llvm-project/pull/67999