From f8bb0d97cb99adf7857854a18f96f8d499fff07d Mon Sep 17 00:00:00 2001
From: Jinsong Ji <jji@us.ibm.com>
Date: Fri, 21 May 2021 16:15:08 +0000
Subject: [PATCH] [PowerPC] Add stack guard tests

Copied from X86 and test powerpc triple.
Preparing for AIX stack guard tests.
---
 llvm/test/CodeGen/PowerPC/stack-guard-oob.ll | 414 +++++++++++++++++++
 1 file changed, 414 insertions(+)
 create mode 100644 llvm/test/CodeGen/PowerPC/stack-guard-oob.ll

diff --git a/llvm/test/CodeGen/PowerPC/stack-guard-oob.ll b/llvm/test/CodeGen/PowerPC/stack-guard-oob.ll
new file mode 100644
index 000000000000..ba728fefd876
--- /dev/null
+++ b/llvm/test/CodeGen/PowerPC/stack-guard-oob.ll
@@ -0,0 +1,414 @@
+; RUN: llc -mtriple=powerpc64le -O0 < %s | FileCheck %s
+
+; CHECK-LABEL: in_bounds:
+; CHECK-NOT: __stack_chk_guard
+define i32 @in_bounds() #0 {
+  %var = alloca i32, align 4
+  store i32 0, i32* %var, align 4
+  %gep = getelementptr inbounds i32, i32* %var, i32 0
+  %ret = load i32, i32* %gep, align 4
+  ret i32 %ret
+}
+
+; CHECK-LABEL: constant_out_of_bounds:
+; CHECK: __stack_chk_guard
+define i32 @constant_out_of_bounds() #0 {
+  %var = alloca i32, align 4
+  store i32 0, i32* %var, align 4
+  %gep = getelementptr inbounds i32, i32* %var, i32 1
+  %ret = load i32, i32* %gep, align 4
+  ret i32 %ret
+}
+
+; CHECK-LABEL: nonconstant_out_of_bounds:
+; CHECK: __stack_chk_guard
+define i32 @nonconstant_out_of_bounds(i32 %n) #0 {
+  %var = alloca i32, align 4
+  store i32 0, i32* %var, align 4
+  %gep = getelementptr inbounds i32, i32* %var, i32 %n
+  %ret = load i32, i32* %gep, align 4
+  ret i32 %ret
+}
+
+; CHECK-LABEL: phi_before_gep_in_bounds:
+; CHECK-NOT: __stack_chk_guard
+define i32 @phi_before_gep_in_bounds(i32 %k) #0 {
+entry:
+  %var1 = alloca i32, align 4
+  %var2 = alloca i32, align 4
+  store i32 0, i32* %var1, align 4
+  store i32 0, i32* %var2, align 4
+  %cmp = icmp ne i32 %k, 0
+  br i1 %cmp, label %if, label %then
+
+if:
+  br label %then
+
+then:
+  %ptr = phi i32* [ %var1, %entry ], [ %var2, %if ]
+  %gep = getelementptr inbounds i32, i32* %ptr, i32 0
+  %ret = load i32, i32* %gep, align 4
+  ret i32 %ret
+}
+
+; CHECK-LABEL: phi_before_gep_constant_out_of_bounds:
+; CHECK: __stack_chk_guard
+define i32 @phi_before_gep_constant_out_of_bounds(i32 %k) #0 {
+entry:
+  %var1 = alloca i32, align 4
+  %var2 = alloca i32, align 4
+  store i32 0, i32* %var1, align 4
+  store i32 0, i32* %var2, align 4
+  %cmp = icmp ne i32 %k, 0
+  br i1 %cmp, label %if, label %then
+
+if:
+  br label %then
+
+then:
+  %ptr = phi i32* [ %var1, %entry ], [ %var2, %if ]
+  %gep = getelementptr inbounds i32, i32* %ptr, i32 1
+  %ret = load i32, i32* %gep, align 4
+  ret i32 %ret
+}
+
+; CHECK-LABEL: phi_before_gep_nonconstant_out_of_bounds:
+; CHECK: __stack_chk_guard
+define i32 @phi_before_gep_nonconstant_out_of_bounds(i32 %k, i32 %n) #0 {
+entry:
+  %var1 = alloca i32, align 4
+  %var2 = alloca i32, align 4
+  store i32 0, i32* %var1, align 4
+  store i32 0, i32* %var2, align 4
+  %cmp = icmp ne i32 %k, 0
+  br i1 %cmp, label %if, label %then
+
+if:
+  br label %then
+
+then:
+  %ptr = phi i32* [ %var1, %entry ], [ %var2, %if ]
+  %gep = getelementptr inbounds i32, i32* %ptr, i32 %n
+  %ret = load i32, i32* %gep, align 4
+  ret i32 %ret
+}
+
+; CHECK-LABEL: phi_after_gep_in_bounds:
+; CHECK-NOT: __stack_chk_guard
+define i32 @phi_after_gep_in_bounds(i32 %k) #0 {
+entry:
+  %var1 = alloca i32, align 4
+  %var2 = alloca i32, align 4
+  store i32 0, i32* %var1, align 4
+  store i32 0, i32* %var2, align 4
+  %cmp = icmp ne i32 %k, 0
+  br i1 %cmp, label %if, label %else
+
+if:
+  %gep1 = getelementptr inbounds i32, i32* %var1, i32 0
+  br label %then
+
+else:
+  %gep2 = getelementptr inbounds i32, i32* %var2, i32 0
+  br label %then
+
+then:
+  %ptr = phi i32* [ %gep1, %if ], [ %gep2, %else ]
+  %ret = load i32, i32* %ptr, align 4
+  ret i32 %ret
+}
+
+; CHECK-LABEL: phi_after_gep_constant_out_of_bounds_a:
+; CHECK: __stack_chk_guard
+define i32 @phi_after_gep_constant_out_of_bounds_a(i32 %k) #0 {
+entry:
+  %var1 = alloca i32, align 4
+  %var2 = alloca i32, align 4
+  store i32 0, i32* %var1, align 4
+  store i32 0, i32* %var2, align 4
+  %cmp = icmp ne i32 %k, 0
+  br i1 %cmp, label %if, label %else
+
+if:
+  %gep1 = getelementptr inbounds i32, i32* %var1, i32 0
+  br label %then
+
+else:
+  %gep2 = getelementptr inbounds i32, i32* %var2, i32 1
+  br label %then
+
+then:
+  %ptr = phi i32* [ %gep1, %if ], [ %gep2, %else ]
+  %ret = load i32, i32* %ptr, align 4
+  ret i32 %ret
+}
+
+; CHECK-LABEL: phi_after_gep_constant_out_of_bounds_b:
+; CHECK: __stack_chk_guard
+define i32 @phi_after_gep_constant_out_of_bounds_b(i32 %k) #0 {
+entry:
+  %var1 = alloca i32, align 4
+  %var2 = alloca i32, align 4
+  store i32 0, i32* %var1, align 4
+  store i32 0, i32* %var2, align 4
+  %cmp = icmp ne i32 %k, 0
+  br i1 %cmp, label %if, label %else
+
+if:
+  %gep1 = getelementptr inbounds i32, i32* %var1, i32 1
+  br label %then
+
+else:
+  %gep2 = getelementptr inbounds i32, i32* %var2, i32 0
+  br label %then
+
+then:
+  %ptr = phi i32* [ %gep1, %if ], [ %gep2, %else ]
+  %ret = load i32, i32* %ptr, align 4
+  ret i32 %ret
+}
+
+; CHECK-LABEL: phi_different_types_a:
+; CHECK: __stack_chk_guard
+define i64 @phi_different_types_a(i32 %k) #0 {
+entry:
+  %var1 = alloca i64, align 4
+  %var2 = alloca i32, align 4
+  store i64 0, i64* %var1, align 4
+  store i32 0, i32* %var2, align 4
+  %cmp = icmp ne i32 %k, 0
+  br i1 %cmp, label %if, label %then
+
+if:
+  %bitcast = bitcast i32* %var2 to i64*
+  br label %then
+
+then:
+  %ptr = phi i64* [ %var1, %entry ], [ %bitcast, %if ]
+  %ret = load i64, i64* %ptr, align 4
+  ret i64 %ret
+}
+
+; CHECK-LABEL: phi_different_types_b:
+; CHECK: __stack_chk_guard
+define i64 @phi_different_types_b(i32 %k) #0 {
+entry:
+  %var1 = alloca i32, align 4
+  %var2 = alloca i64, align 4
+  store i32 0, i32* %var1, align 4
+  store i64 0, i64* %var2, align 4
+  %cmp = icmp ne i32 %k, 0
+  br i1 %cmp, label %if, label %then
+
+if:
+  %bitcast = bitcast i32* %var1 to i64*
+  br label %then
+
+then:
+  %ptr = phi i64* [ %var2, %entry ], [ %bitcast, %if ]
+  %ret = load i64, i64* %ptr, align 4
+  ret i64 %ret
+}
+
+; CHECK-LABEL: phi_after_gep_nonconstant_out_of_bounds_a:
+; CHECK: __stack_chk_guard
+define i32 @phi_after_gep_nonconstant_out_of_bounds_a(i32 %k, i32 %n) #0 {
+entry:
+  %var1 = alloca i32, align 4
+  %var2 = alloca i32, align 4
+  store i32 0, i32* %var1, align 4
+  store i32 0, i32* %var2, align 4
+  %cmp = icmp ne i32 %k, 0
+  br i1 %cmp, label %if, label %else
+
+if:
+  %gep1 = getelementptr inbounds i32, i32* %var1, i32 0
+  br label %then
+
+else:
+  %gep2 = getelementptr inbounds i32, i32* %var2, i32 %n
+  br label %then
+
+then:
+  %ptr = phi i32* [ %gep1, %if ], [ %gep2, %else ]
+  %ret = load i32, i32* %ptr, align 4
+  ret i32 %ret
+}
+
+; CHECK-LABEL: phi_after_gep_nonconstant_out_of_bounds_b:
+; CHECK: __stack_chk_guard
+define i32 @phi_after_gep_nonconstant_out_of_bounds_b(i32 %k, i32 %n) #0 {
+entry:
+  %var1 = alloca i32, align 4
+  %var2 = alloca i32, align 4
+  store i32 0, i32* %var1, align 4
+  store i32 0, i32* %var2, align 4
+  %cmp = icmp ne i32 %k, 0
+  br i1 %cmp, label %if, label %else
+
+if:
+  %gep1 = getelementptr inbounds i32, i32* %var1, i32 %n
+  br label %then
+
+else:
+  %gep2 = getelementptr inbounds i32, i32* %var2, i32 0
+  br label %then
+
+then:
+  %ptr = phi i32* [ %gep1, %if ], [ %gep2, %else ]
+  %ret = load i32, i32* %ptr, align 4
+  ret i32 %ret
+}
+
+%struct.outer = type { %struct.inner, %struct.inner }
+%struct.inner = type { i32, i32 }
+
+; CHECK-LABEL: struct_in_bounds:
+; CHECK-NOT: __stack_chk_guard
+define void @struct_in_bounds() #0 {
+  %var = alloca %struct.outer, align 4
+  %outergep = getelementptr inbounds %struct.outer, %struct.outer* %var, i32 0, i32 1
+  %innergep = getelementptr inbounds %struct.inner, %struct.inner* %outergep, i32 0, i32 1
+  store i32 0, i32* %innergep, align 4
+  ret void
+}
+
+; CHECK-LABEL: struct_constant_out_of_bounds_a:
+; CHECK: __stack_chk_guard
+define void @struct_constant_out_of_bounds_a() #0 {
+  %var = alloca %struct.outer, align 4
+  %outergep = getelementptr inbounds %struct.outer, %struct.outer* %var, i32 1, i32 0
+  %innergep = getelementptr inbounds %struct.inner, %struct.inner* %outergep, i32 0, i32 0
+  store i32 0, i32* %innergep, align 4
+  ret void
+}
+
+; CHECK-LABEL: struct_constant_out_of_bounds_b:
+; Here the offset is out-of-bounds of the addressed struct.inner member, but
+; still within bounds of the outer struct so no stack guard is needed.
+; CHECK-NOT: __stack_chk_guard
+define void @struct_constant_out_of_bounds_b() #0 {
+  %var = alloca %struct.outer, align 4
+  %outergep = getelementptr inbounds %struct.outer, %struct.outer* %var, i32 0, i32 0
+  %innergep = getelementptr inbounds %struct.inner, %struct.inner* %outergep, i32 1, i32 0
+  store i32 0, i32* %innergep, align 4
+  ret void
+}
+
+; CHECK-LABEL: struct_constant_out_of_bounds_c:
+; Here we are out-of-bounds of both the inner and outer struct.
+; CHECK: __stack_chk_guard
+define void @struct_constant_out_of_bounds_c() #0 {
+  %var = alloca %struct.outer, align 4
+  %outergep = getelementptr inbounds %struct.outer, %struct.outer* %var, i32 0, i32 1
+  %innergep = getelementptr inbounds %struct.inner, %struct.inner* %outergep, i32 1, i32 0
+  store i32 0, i32* %innergep, align 4
+  ret void
+}
+
+; CHECK-LABEL: struct_nonconstant_out_of_bounds_a:
+; CHECK: __stack_chk_guard
+define void @struct_nonconstant_out_of_bounds_a(i32 %n) #0 {
+  %var = alloca %struct.outer, align 4
+  %outergep = getelementptr inbounds %struct.outer, %struct.outer* %var, i32 %n, i32 0
+  %innergep = getelementptr inbounds %struct.inner, %struct.inner* %outergep, i32 0, i32 0
+  store i32 0, i32* %innergep, align 4
+  ret void
+}
+
+; CHECK-LABEL: struct_nonconstant_out_of_bounds_b:
+; CHECK: __stack_chk_guard
+define void @struct_nonconstant_out_of_bounds_b(i32 %n) #0 {
+  %var = alloca %struct.outer, align 4
+  %outergep = getelementptr inbounds %struct.outer, %struct.outer* %var, i32 0, i32 0
+  %innergep = getelementptr inbounds %struct.inner, %struct.inner* %outergep, i32 %n, i32 0
+  store i32 0, i32* %innergep, align 4
+  ret void
+}
+
+; CHECK-LABEL: bitcast_smaller_load
+; CHECK-NOT: __stack_chk_guard
+define i32 @bitcast_smaller_load() #0 {
+  %var = alloca i64, align 4
+  store i64 0, i64* %var, align 4
+  %bitcast = bitcast i64* %var to i32*
+  %ret = load i32, i32* %bitcast, align 4
+  ret i32 %ret
+}
+
+; CHECK-LABEL: bitcast_same_size_load
+; CHECK-NOT: __stack_chk_guard
+define i32 @bitcast_same_size_load() #0 {
+  %var = alloca i64, align 4
+  store i64 0, i64* %var, align 4
+  %bitcast = bitcast i64* %var to %struct.inner*
+  %gep = getelementptr inbounds %struct.inner, %struct.inner* %bitcast, i32 0, i32 1
+  %ret = load i32, i32* %gep, align 4
+  ret i32 %ret
+}
+
+; CHECK-LABEL: bitcast_larger_load
+; CHECK: __stack_chk_guard
+define i64 @bitcast_larger_load() #0 {
+  %var = alloca i32, align 4
+  store i32 0, i32* %var, align 4
+  %bitcast = bitcast i32* %var to i64*
+  %ret = load i64, i64* %bitcast, align 4
+  ret i64 %ret
+}
+
+; CHECK-LABEL: bitcast_larger_store
+; CHECK: __stack_chk_guard
+define i32 @bitcast_larger_store() #0 {
+  %var = alloca i32, align 4
+  %bitcast = bitcast i32* %var to i64*
+  store i64 0, i64* %bitcast, align 4
+  %ret = load i32, i32* %var, align 4
+  ret i32 %ret
+}
+
+; CHECK-LABEL: bitcast_larger_cmpxchg
+; CHECK: __stack_chk_guard
+define i64 @bitcast_larger_cmpxchg(i64 %desired, i64 %new) #0 {
+  %var = alloca i32, align 4
+  %bitcast = bitcast i32* %var to i64*
+  %pair = cmpxchg i64* %bitcast, i64 %desired, i64 %new seq_cst monotonic
+  %ret = extractvalue { i64, i1 } %pair, 0
+  ret i64 %ret
+}
+
+; CHECK-LABEL: bitcast_larger_atomic_rmw
+; CHECK: __stack_chk_guard
+define i64 @bitcast_larger_atomic_rmw() #0 {
+  %var = alloca i32, align 4
+  %bitcast = bitcast i32* %var to i64*
+  %ret = atomicrmw add i64* %bitcast, i64 1 monotonic
+  ret i64 %ret
+}
+
+%struct.packed = type <{ i16, i32 }>
+
+; CHECK-LABEL: bitcast_overlap
+; CHECK: __stack_chk_guard
+define i32 @bitcast_overlap() #0 {
+  %var = alloca i32, align 4
+  %bitcast = bitcast i32* %var to %struct.packed*
+  %gep = getelementptr inbounds %struct.packed, %struct.packed* %bitcast, i32 0, i32 1
+  %ret = load i32, i32* %gep, align 2
+  ret i32 %ret
+}
+
+%struct.multi_dimensional = type { [10 x [10 x i32]], i32 }
+
+; CHECK-LABEL: multi_dimensional_array
+; CHECK: __stack_chk_guard
+define i32 @multi_dimensional_array() #0 {
+  %var = alloca %struct.multi_dimensional, align 4
+  %gep1 = getelementptr inbounds %struct.multi_dimensional, %struct.multi_dimensional* %var, i32 0, i32 0
+  %gep2 = getelementptr inbounds [10 x [10 x i32]], [10 x [10 x i32]]* %gep1, i32 0, i32 10
+  %gep3 = getelementptr inbounds [10 x i32], [10 x i32]* %gep2, i32 0, i32 5
+  %ret = load i32, i32* %gep3, align 4
+  ret i32 %ret
+}
+
+attributes #0 = { sspstrong }