1 files changed, 57 insertions, 0 deletions
diff --git a/llvm/test/CodeGen/ARM/reg-alloc-with-fixed-reg-r6.ll b/llvm/test/CodeGen/ARM/reg-alloc-with-fixed-reg-r6.ll
new file mode 100644
index 00000000000..3647c0701a7
--- /dev/null
+++ b/llvm/test/CodeGen/ARM/reg-alloc-with-fixed-reg-r6.ll
@@ -0,0 +1,57 @@
+; RUN: llc < %s -mattr=+reserve-r6 -mtriple=arm-linux-gnueabi -O0 -filetype=asm --regalloc=fast 2>&1 | FileCheck %s
+;
+; Equivalent C source code
+; void bar(unsigned int i,
+;          unsigned int j,
+;          unsigned int k,
+;          unsigned int l,
+;          unsigned int m,
+;          unsigned int n,
+;          unsigned int o,
+;          unsigned int p)
+; {
+;     unsigned int result = i + j + k + l + m + n + o + p;
+; }
+
+define void @bar(i32 %i, i32 %j, i32 %k, i32 %l, i32 %m, i32 %n, i32 %o, i32 %p) nounwind {
+entry:
+; CHECK-NOT: push {{{.*}}r6,{{.*}}}
+  %i.addr = alloca i32, align 4
+  %j.addr = alloca i32, align 4
+  %k.addr = alloca i32, align 4
+  %l.addr = alloca i32, align 4
+  %m.addr = alloca i32, align 4
+  %n.addr = alloca i32, align 4
+  %o.addr = alloca i32, align 4
+  %p.addr = alloca i32, align 4
+  %result = alloca i32, align 4
+  store i32 %i, i32* %i.addr, align 4
+  store i32 %j, i32* %j.addr, align 4
+  store i32 %k, i32* %k.addr, align 4
+  store i32 %l, i32* %l.addr, align 4
+  store i32 %m, i32* %m.addr, align 4
+  store i32 %n, i32* %n.addr, align 4
+  store i32 %o, i32* %o.addr, align 4
+  store i32 %p, i32* %p.addr, align 4
+  %0 = load i32, i32* %i.addr, align 4
+  %1 = load i32, i32* %j.addr, align 4
+  %add = add i32 %0, %1
+  %2 = load i32, i32* %k.addr, align 4
+  %add1 = add i32 %add, %2
+  %3 = load i32, i32* %l.addr, align 4
+  %add2 = add i32 %add1, %3
+  %4 = load i32, i32* %m.addr, align 4
+  %add3 = add i32 %add2, %4
+  %5 = load i32, i32* %n.addr, align 4
+  %add4 = add i32 %add3, %5
+  %6 = load i32, i32* %o.addr, align 4
+  %add5 = add i32 %add4, %6
+  %7 = load i32, i32* %p.addr, align 4
+  %add6 = add i32 %add5, %7
+  store i32 %add6, i32* %result, align 4
+; CHECK: {{.*}}r5{{.*}}
+; CHECK-NOT: {{.*}}r6{{.*}}
+  ret void
+; CHECK-NOT: pop {{{.*}}r6,{{.*}}}
+}
+