[clang] 7f00395 - [SystemZ] Implement __builtin_eh_return_data_regno

[Ulrich Weigand via cfe-commits]

Author: Ulrich Weigand
Date: 2020-07-24T10:28:06+02:00
New Revision: 7f003957bfcd1ed29ded176f04e3cdb55a0c0112

URL: https://github.com/llvm/llvm-project/commit/7f003957bfcd1ed29ded176f04e3cdb55a0c0112
DIFF: https://github.com/llvm/llvm-project/commit/7f003957bfcd1ed29ded176f04e3cdb55a0c0112.diff

LOG: [SystemZ] Implement __builtin_eh_return_data_regno

Implement __builtin_eh_return_data_regno for SystemZ.
Match behavior of GCC.

Author: slavek-kucera

Differential Revision: https://reviews.llvm.org/D84341

Added: 
    

Modified: 
    clang/lib/Basic/Targets/SystemZ.h
    clang/test/CodeGen/builtins-systemz.c

Removed: 
    


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diff  --git a/clang/lib/Basic/Targets/SystemZ.h b/clang/lib/Basic/Targets/SystemZ.h
index d7869e3754a8..39fdcf90d0c8 100644
--- a/clang/lib/Basic/Targets/SystemZ.h
+++ b/clang/lib/Basic/Targets/SystemZ.h
@@ -157,6 +157,10 @@ class LLVM_LIBRARY_VISIBILITY SystemZTargetInfo : public TargetInfo {
   const char *getLongDoubleMangling() const override { return "g"; }
 
   bool hasExtIntType() const override { return true; }
+
+  int getEHDataRegisterNumber(unsigned RegNo) const override {
+    return RegNo < 4 ? 6 + RegNo : -1;
+  }
 };
 } // namespace targets
 } // namespace clang

diff  --git a/clang/test/CodeGen/builtins-systemz.c b/clang/test/CodeGen/builtins-systemz.c
index f5de7009acba..bf8a995383a2 100644
--- a/clang/test/CodeGen/builtins-systemz.c
+++ b/clang/test/CodeGen/builtins-systemz.c
@@ -142,3 +142,10 @@ void test_htmxl1(void) {
   result = __TM_failure_code (tdb);
 }
 
+void test_eh_return_data_regno() {
+  volatile int res;
+  res = __builtin_eh_return_data_regno(0); // CHECK: store volatile i32 6
+  res = __builtin_eh_return_data_regno(1); // CHECK: store volatile i32 7
+  res = __builtin_eh_return_data_regno(2); // CHECK: store volatile i32 8
+  res = __builtin_eh_return_data_regno(3); // CHECK: store volatile i32 9
+}