[Sparc] LLONG is not lock-free atomic on v8

Differential Revision: https://reviews.llvm.org/D26286 llvm-svn: 286376
llvm · Nov 9, 2016 · 13f4a91 · 13f4a91
1 parent dfa7af1
commit 13f4a91
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Showing 3 changed files with 13 additions and 6 deletions.
diff --git a/clang/lib/Basic/Targets.cpp b/clang/lib/Basic/Targets.cpp
@@ -6803,7 +6803,10 @@ class SparcV8TargetInfo : public SparcTargetInfo {
       PtrDiffType = SignedLong;
       break;
     }
-    MaxAtomicPromoteWidth = MaxAtomicInlineWidth = 64;
+    // Up to 32 bits are lock-free atomic, but we're willing to do atomic ops
+    // on up to 64 bits.
+    MaxAtomicPromoteWidth = 64;
+    MaxAtomicInlineWidth = 32;
   }
 
   void getTargetDefines(const LangOptions &Opts,

diff --git a/clang/test/CodeGen/atomics-inlining.c b/clang/test/CodeGen/atomics-inlining.c
@@ -3,7 +3,8 @@
 // RUN: %clang_cc1 -triple powerpc64-linux-gnu -emit-llvm %s -o - | FileCheck %s -check-prefix=PPC64
 // RUN: %clang_cc1 -triple mipsel-linux-gnu -emit-llvm %s -o - | FileCheck %s -check-prefix=MIPS32
 // RUN: %clang_cc1 -triple mips64el-linux-gnu -emit-llvm %s -o - | FileCheck %s -check-prefix=MIPS64
-// RUN: %clang_cc1 -triple sparc-unknown-eabi -emit-llvm %s -o - | FileCheck %s -check-prefix=SPARC
+// RUN: %clang_cc1 -triple sparc-unknown-eabi -emit-llvm %s -o - | FileCheck %s -check-prefix=SPARCV8 -check-prefix=SPARC
+// RUN: %clang_cc1 -triple sparcv9-unknown-eabi -emit-llvm %s -o - | FileCheck %s -check-prefix=SPARCV9 -check-prefix=SPARC
 
 unsigned char c1, c2;
 unsigned short s1, s2;
@@ -99,8 +100,10 @@ void test1(void) {
 // SPARC: store atomic i16 {{.*}}, i16* @s1 seq_cst
 // SPARC: = load atomic i32, i32* @i1 seq_cst
 // SPARC: store atomic i32 {{.*}}, i32* @i1 seq_cst
-// SPARC: = load atomic i64, i64* @ll1 seq_cst
-// SPARC: store atomic i64 {{.*}}, i64* @ll1 seq_cst
-// SPARC: call void @__atomic_load(i32 100, i8* getelementptr inbounds ([100 x i8], [100 x i8]* @a1, i32 0, i32 0), i8* getelementptr inbounds ([100 x i8], [100 x i8]* @a2, i32 0, i32 0)
-// SPARC: call void @__atomic_store(i32 100, i8* getelementptr inbounds ([100 x i8], [100 x i8]* @a1, i32 0, i32 0), i8* getelementptr inbounds ([100 x i8], [100 x i8]* @a2, i32 0, i32 0)
+// SPARCV8: call i64 @__atomic_load_8(i8* bitcast (i64* @ll1 to i8*)
+// SPARCV8: call void @__atomic_store_8(i8* bitcast (i64* @ll1 to i8*), i64
+// SPARCV9: load atomic i64, i64* @ll1 seq_cst, align 8
+// SPARCV9: store atomic i64 %7, i64* @ll1 seq_cst, align 8
+// SPARCV8: call void @__atomic_load(i32 100, i8* getelementptr inbounds ([100 x i8], [100 x i8]* @a1, i32 0, i32 0), i8* getelementptr inbounds ([100 x i8], [100 x i8]* @a2, i32 0, i32 0)
+// SPARCV8: call void @__atomic_store(i32 100, i8* getelementptr inbounds ([100 x i8], [100 x i8]* @a1, i32 0, i32 0), i8* getelementptr inbounds ([100 x i8], [100 x i8]* @a2, i32 0, i32 0)
 }
diff --git a/clang/test/Preprocessor/init.c b/clang/test/Preprocessor/init.c
@@ -6913,6 +6913,7 @@
 // SPARC:#define __FLT_MIN_EXP__ (-125)
 // SPARC:#define __FLT_MIN__ 1.17549435e-38F
 // SPARC:#define __FLT_RADIX__ 2
+// SPARC:#define __GCC_ATOMIC_LLONG_LOCK_FREE 1
 // SPARC:#define __INT16_C_SUFFIX__
 // SPARC:#define __INT16_FMTd__ "hd"
 // SPARC:#define __INT16_FMTi__ "hi"