[PATCH] D14205: [x86] Front-end part of MCU psABI support

[Andrey Bokhanko via cfe-commits]

andreybokhanko created this revision.
andreybokhanko added reviewers: rnk, DavidKreitzer, mkuper.
andreybokhanko added a subscriber: cfe-commits.

This patch implements front-end parts of MCU psABI 
(https://docs.google.com/viewer?a=v&pid=sites&srcid=ZGVmYXVsdGRvbWFpbnx4MzJhYml8Z3g6NzFhMGYzMjUzZDQzODllMw)
 support:

1) "long double type is the same as double."
2) "New predefined C/C++ pre-processor symbols: __iamcu and __iamcu__.

http://reviews.llvm.org/D14205

Files:
  lib/Basic/Targets.cpp
  test/CodeGen/x86_32-arguments-iamcu.c
  test/Preprocessor/elfiamcu-predefines.c

Index: lib/Basic/Targets.cpp
===================================================================
--- lib/Basic/Targets.cpp
+++ lib/Basic/Targets.cpp
@@ -2319,7 +2319,8 @@
 public:
   X86TargetInfo(const llvm::Triple &Triple) : TargetInfo(Triple) {
     BigEndian = false;
-    LongDoubleFormat = &llvm::APFloat::x87DoubleExtended;
+    LongDoubleFormat = Triple.isOSIAMCU() ? &llvm::APFloat::IEEEdouble
+                                          : &llvm::APFloat::x87DoubleExtended;
   }
   unsigned getFloatEvalMethod() const override {
     // X87 evaluates with 80 bits "long double" precision.
@@ -3354,6 +3355,11 @@
   }
   if (CPU >= CK_i586)
     Builder.defineMacro("__GCC_HAVE_SYNC_COMPARE_AND_SWAP_8");
+
+  if (getTriple().isOSIAMCU()) {
+    Builder.defineMacro("__iamcu");
+    Builder.defineMacro("__iamcu__");
+  }
 }
 
 bool X86TargetInfo::hasFeature(StringRef Feature) const {
Index: test/CodeGen/x86_32-arguments-iamcu.c
===================================================================
--- test/CodeGen/x86_32-arguments-iamcu.c
+++ test/CodeGen/x86_32-arguments-iamcu.c
@@ -56,3 +56,7 @@
 // insane.
 // CHECK-LABEL: define i32 @varArgs(i32 inreg %i1, ...)
 int varArgs(int i1, ...) { return i1; }
+
+// CHECK-LABEL: define double @longDoubleArg(double %ld1)
+long double longDoubleArg(long double ld1) { return ld1; }
+
Index: test/Preprocessor/elfiamcu-predefines.c
===================================================================
--- test/Preprocessor/elfiamcu-predefines.c
+++ test/Preprocessor/elfiamcu-predefines.c
@@ -0,0 +1,5 @@
+// RUN: %clang_cc1 -E -dM -triple i586-intel-elfiamcu | FileCheck %s
+
+// CHECK: #define __iamcu
+// CHECK: #define __iamcu__
+



Index: lib/Basic/Targets.cpp
===================================================================
--- lib/Basic/Targets.cpp
+++ lib/Basic/Targets.cpp
@@ -2319,7 +2319,8 @@
 public:
   X86TargetInfo(const llvm::Triple &Triple) : TargetInfo(Triple) {
     BigEndian = false;
-    LongDoubleFormat = &llvm::APFloat::x87DoubleExtended;
+    LongDoubleFormat = Triple.isOSIAMCU() ? &llvm::APFloat::IEEEdouble
+                                          : &llvm::APFloat::x87DoubleExtended;
   }
   unsigned getFloatEvalMethod() const override {
     // X87 evaluates with 80 bits "long double" precision.
@@ -3354,6 +3355,11 @@
   }
   if (CPU >= CK_i586)
     Builder.defineMacro("__GCC_HAVE_SYNC_COMPARE_AND_SWAP_8");
+
+  if (getTriple().isOSIAMCU()) {
+    Builder.defineMacro("__iamcu");
+    Builder.defineMacro("__iamcu__");
+  }
 }
 
 bool X86TargetInfo::hasFeature(StringRef Feature) const {
Index: test/CodeGen/x86_32-arguments-iamcu.c
===================================================================
--- test/CodeGen/x86_32-arguments-iamcu.c
+++ test/CodeGen/x86_32-arguments-iamcu.c
@@ -56,3 +56,7 @@
 // insane.
 // CHECK-LABEL: define i32 @varArgs(i32 inreg %i1, ...)
 int varArgs(int i1, ...) { return i1; }
+
+// CHECK-LABEL: define double @longDoubleArg(double %ld1)
+long double longDoubleArg(long double ld1) { return ld1; }
+
Index: test/Preprocessor/elfiamcu-predefines.c
===================================================================
--- test/Preprocessor/elfiamcu-predefines.c
+++ test/Preprocessor/elfiamcu-predefines.c
@@ -0,0 +1,5 @@
+// RUN: %clang_cc1 -E -dM -triple i586-intel-elfiamcu | FileCheck %s
+
+// CHECK: #define __iamcu
+// CHECK: #define __iamcu__
+

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