[CodeGen] Always emit the 'min-legal-vector-width' attribute even when the value...

The X86 backend will need to see the attribute to make decisions. If it isn't present the backend will have to assume large vectors may be present.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@345237 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/CodeGen/CodeGenFunction.cpp b/lib/CodeGen/CodeGenFunction.cpp
index 41bde79abab3518cdd15a20623ae3eaf292d1de3..700723189ed189207c1a710377fb17856eeb6b6d 100644 (file)
--- a/lib/CodeGen/CodeGenFunction.cpp
+++ b/lib/CodeGen/CodeGenFunction.cpp
@@ -448,9 +448,7 @@ void CodeGenFunction::FinishFunction(SourceLocation EndLoc) {
   // 4. Width of vector arguments and return types for this function.
   // 5. Width of vector aguments and return types for functions called by this
   //    function.
-  if (LargestVectorWidth != 0)
-    CurFn->addFnAttr("min-legal-vector-width",
-                     llvm::utostr(LargestVectorWidth));
+  CurFn->addFnAttr("min-legal-vector-width", llvm::utostr(LargestVectorWidth));
 }
 
 /// ShouldInstrumentFunction - Return true if the current function should be

diff --git a/test/CodeGen/aarch64-neon-ldst-one.c b/test/CodeGen/aarch64-neon-ldst-one.c
index 97ded9a596666072b34a4bf8c1889b9a16447372..0d20982408cfdb9890a0386ed8f628adb7c7a0f4 100644 (file)
--- a/test/CodeGen/aarch64-neon-ldst-one.c
+++ b/test/CodeGen/aarch64-neon-ldst-one.c
@@ -6800,4 +6800,4 @@ void test_vst4_lane_p64(poly64_t  *a, poly64x1x4_t b) {
 
 // CHECK: attributes #0 ={{.*}}"min-legal-vector-width"="128"
 // CHECK: attributes #1 ={{.*}}"min-legal-vector-width"="64"
-// CHECK-NOT: attributes #2 ={{.*}}"min-legal-vector-width"
+// CHECK: attributes #2 ={{.*}}"min-legal-vector-width"="0"

diff --git a/test/CodeGen/aarch64-poly64.c b/test/CodeGen/aarch64-poly64.c
index 53493033c286f6ce5289fa1ecb61a7c2df0dc472..cdf91699c9b0c0f88955c066149418a8de41276e 100644 (file)
--- a/test/CodeGen/aarch64-poly64.c
+++ b/test/CodeGen/aarch64-poly64.c
@@ -614,4 +614,4 @@ poly64x2_t test_vsriq_n_p64(poly64x2_t a, poly64x2_t b) {
 
 // CHECK: attributes #0 ={{.*}}"min-legal-vector-width"="64"
 // CHECK: attributes #1 ={{.*}}"min-legal-vector-width"="128"
-// CHECK-NOT: attributes #2 ={{.*}}"min-legal-vector-width"
+// CHECK: attributes #2 ={{.*}}"min-legal-vector-width"="0"