Rebased PNaCl localmods in LLVM to 223109

test/Transforms/NaCl/strip-attributes.ll

+; RUN: opt -S -nacl-strip-attributes %s 2>&1 | FileCheck %s
+
+
+; Check that we emit a warning for some special meaning sections:
+; CHECK: Warning: func_init_array will have its section (.init_array) stripped.
+; CHECK-NOT: Warning: __rustc_debug_gdb_scripts_section__ will have its section
+
+@var = unnamed_addr global i32 0
+; CHECK: @var = global i32 0
+
+@__rustc_debug_gdb_scripts_section__ = internal unnamed_addr constant [34 x i8] c"\01gdb_load_rust_pretty_printers.py\00", section ".debug_gdb_scripts", align 1
+; CHECK: @__rustc_debug_gdb_scripts_section__ = internal constant [34 x i8] c"\01gdb_load_rust_pretty_printers.py\00", align 1
+
+define void @func_section() section ".some_section" {
+  ret void
+}
+; CHECK-LABEL: define void @func_section() {
+
+define void @func_init_array() section ".init_array" {
+  ret void
+}
+; CHECK-LABEL: define void @func_init_array() {
+
+
+define fastcc void @func_attrs(i32 inreg, i32 zeroext)
+    unnamed_addr noreturn nounwind readonly align 8 {
+  ret void
+}
+; CHECK: define void @func_attrs(i32, i32) {
+
+define hidden void @hidden_visibility() {
+  ret void
+}
+; CHECK: define void @hidden_visibility() {
+
+define protected void @protected_visibility() {
+  ret void
+}
+; CHECK: define void @protected_visibility() {
+
+
+define void @call_attrs() {
+  call fastcc void @func_attrs(i32 inreg 10, i32 zeroext 20) noreturn nounwind readonly
+  ret void
+}
+; CHECK: define void @call_attrs()
+; CHECK: call void @func_attrs(i32 10, i32 20){{$}}
+
+
+; We currently don't attempt to strip attributes from intrinsic
+; declarations because the reader automatically inserts attributes
+; based on built-in knowledge of intrinsics, so it is difficult to get
+; rid of them here.
+declare i8* @llvm.nacl.read.tp()
+; CHECK: declare i8* @llvm.nacl.read.tp() #{{[0-9]+}}
+
+define void @arithmetic_attrs() {
+  %add = add nsw i32 1, 2
+  %shl = shl nuw i32 3, 4
+  %lshr = lshr exact i32 2, 1
+  ret void
+}
+; CHECK: define void @arithmetic_attrs() {
+; CHECK-NEXT: %add = add i32 1, 2
+; CHECK-NEXT: %shl = shl i32 3, 4
+; CHECK-NEXT: %lshr = lshr i32 2, 1
+
+
+; Implicit default alignments are changed to explicit alignments.
+define void @default_alignment_attrs(float %f, double %d) {
+  load i8* null
+  load i32* null
+  load float* null
+  load double* null
+
+  store i8 100, i8* null
+  store i32 100, i32* null
+  store float %f, float* null
+  store double %d, double* null
+  ret void
+}
+; CHECK: define void @default_alignment_attrs
+; CHECK-NEXT: load i8* null, align 1
+; CHECK-NEXT: load i32* null, align 1
+; CHECK-NEXT: load float* null, align 4
+; CHECK-NEXT: load double* null, align 8
+; CHECK-NEXT: store i8 100, i8* null, align 1
+; CHECK-NEXT: store i32 100, i32* null, align 1
+; CHECK-NEXT: store float %f, float* null, align 4
+; CHECK-NEXT: store double %d, double* null, align 8
+
+define void @reduce_alignment_assumptions() {
+  load i32* null, align 4
+  load float* null, align 2
+  load float* null, align 4
+  load float* null, align 8
+  load double* null, align 2
+  load double* null, align 8
+  load double* null, align 16
+
+  ; Higher alignment assumptions must be retained for atomics.
+  load atomic i32* null seq_cst, align 4
+  load atomic i32* null seq_cst, align 8
+  store atomic i32 100, i32* null seq_cst, align 4
+  store atomic i32 100, i32* null seq_cst, align 8
+  ret void
+}
+; CHECK: define void @reduce_alignment_assumptions
+; CHECK-NEXT: load i32* null, align 1
+; CHECK-NEXT: load float* null, align 1
+; CHECK-NEXT: load float* null, align 4
+; CHECK-NEXT: load float* null, align 4
+; CHECK-NEXT: load double* null, align 1
+; CHECK-NEXT: load double* null, align 8
+; CHECK-NEXT: load double* null, align 8
+; CHECK-NEXT: load atomic i32* null seq_cst, align 4
+; CHECK-NEXT: load atomic i32* null seq_cst, align 4
+; CHECK-NEXT: store atomic i32 100, i32* null seq_cst, align 4
+; CHECK-NEXT: store atomic i32 100, i32* null seq_cst, align 4
+
+declare void @llvm.memcpy.p0i8.p0i8.i32(i8*, i8*, i32, i32, i1)
+declare void @llvm.memmove.p0i8.p0i8.i32(i8*, i8*, i32, i32, i1)
+declare void @llvm.memset.p0i8.i32(i8*, i8, i32, i32, i1)
+
+define void @reduce_memcpy_alignment_assumptions(i8* %ptr) {
+  call void @llvm.memcpy.p0i8.p0i8.i32(i8* %ptr, i8* %ptr,
+                                       i32 20, i32 4, i1 false)
+  call void @llvm.memmove.p0i8.p0i8.i32(i8* %ptr, i8* %ptr,
+                                        i32 20, i32 4, i1 false)
+  call void @llvm.memset.p0i8.i32(i8* %ptr, i8 99,
+                                  i32 20, i32 4, i1 false)
+  ret void
+}
+; CHECK: define void @reduce_memcpy_alignment_assumptions
+; CHECK-NEXT: call void @llvm.memcpy.{{.*}}  i32 20, i32 1, i1 false)
+; CHECK-NEXT: call void @llvm.memmove.{{.*}} i32 20, i32 1, i1 false)
+; CHECK-NEXT: call void @llvm.memset.{{.*}}  i32 20, i32 1, i1 false)