From ebc535bc4af93e642bce7bd284946b858f38332c Mon Sep 17 00:00:00 2001
From: Tom Stellard <thomas.stellard@amd.com>
Date: Tue, 5 Feb 2013 17:09:13 +0000
Subject: R600: Add tests for instruction predicates

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174393 91177308-0d34-0410-b5e6-96231b3b80d8
---
 test/CodeGen/R600/predicates.ll | 100 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 100 insertions(+)
 create mode 100644 test/CodeGen/R600/predicates.ll

(limited to 'test/CodeGen/R600/predicates.ll')

diff --git a/test/CodeGen/R600/predicates.ll b/test/CodeGen/R600/predicates.ll
new file mode 100644
index 0000000000..18895a423e
--- /dev/null
+++ b/test/CodeGen/R600/predicates.ll
@@ -0,0 +1,100 @@
+; RUN: llc < %s -march=r600 -mcpu=redwood | FileCheck %s
+
+; These tests make sure the compiler is optimizing branches using predicates
+; when it is legal to do so.
+
+; CHECK: @simple_if
+; CHECK: PRED_SET{{[EGN][ET]*}}_INT Pred,
+; CHECK: LSHL T{{[0-9]+\.[XYZW], T[0-9]+\.[XYZW]}}, 1, 0(0.000000e+00) Pred_sel
+define void @simple_if(i32 addrspace(1)* %out, i32 %in) {
+entry:
+  %0 = icmp sgt i32 %in, 0
+  br i1 %0, label %IF, label %ENDIF
+
+IF:
+  %1 = shl i32 %in, 1
+  br label %ENDIF
+
+ENDIF:
+  %2 = phi i32 [ %in, %entry ], [ %1, %IF ]
+  store i32 %2, i32 addrspace(1)* %out
+  ret void
+}
+
+; CHECK: @simple_if_else
+; CHECK: PRED_SET{{[EGN][ET]*}}_INT Pred,
+; CHECK: LSH{{[LR] T[0-9]+\.[XYZW], T[0-9]+\.[XYZW]}}, 1, 0(0.000000e+00) Pred_sel
+; CHECK: LSH{{[LR] T[0-9]+\.[XYZW], T[0-9]+\.[XYZW]}}, 1, 0(0.000000e+00) Pred_sel
+define void @simple_if_else(i32 addrspace(1)* %out, i32 %in) {
+entry:
+  %0 = icmp sgt i32 %in, 0
+  br i1 %0, label %IF, label %ELSE
+
+IF:
+  %1 = shl i32 %in, 1
+  br label %ENDIF
+
+ELSE:
+  %2 = lshr i32 %in, 1
+  br label %ENDIF
+
+ENDIF:
+  %3 = phi i32 [ %1, %IF ], [ %2, %ELSE ]
+  store i32 %3, i32 addrspace(1)* %out
+  ret void
+}
+
+; CHECK: @nested_if
+; CHECK: IF_PREDICATE_SET
+; CHECK: PRED_SET{{[EGN][ET]*}}_INT Pred,
+; CHECK: LSHL T{{[0-9]+\.[XYZW], T[0-9]+\.[XYZW]}}, 1, 0(0.000000e+00) Pred_sel
+; CHECK: ENDIF
+define void @nested_if(i32 addrspace(1)* %out, i32 %in) {
+entry:
+  %0 = icmp sgt i32 %in, 0
+  br i1 %0, label %IF0, label %ENDIF
+
+IF0:
+  %1 = add i32 %in, 10
+  %2 = icmp sgt i32 %1, 0
+  br i1 %2, label %IF1, label %ENDIF
+
+IF1:
+  %3 = shl i32  %1, 1
+  br label %ENDIF
+
+ENDIF:
+  %4 = phi i32 [%in, %entry], [%1, %IF0], [%3, %IF1]
+  store i32 %4, i32 addrspace(1)* %out
+  ret void
+}
+
+; CHECK: @nested_if_else
+; CHECK: IF_PREDICATE_SET
+; CHECK: PRED_SET{{[EGN][ET]*}}_INT Pred,
+; CHECK: LSH{{[LR] T[0-9]+\.[XYZW], T[0-9]+\.[XYZW]}}, 1, 0(0.000000e+00) Pred_sel
+; CHECK: LSH{{[LR] T[0-9]+\.[XYZW], T[0-9]+\.[XYZW]}}, 1, 0(0.000000e+00) Pred_sel
+; CHECK: ENDIF
+define void @nested_if_else(i32 addrspace(1)* %out, i32 %in) {
+entry:
+  %0 = icmp sgt i32 %in, 0
+  br i1 %0, label %IF0, label %ENDIF
+
+IF0:
+  %1 = add i32 %in, 10
+  %2 = icmp sgt i32 %1, 0
+  br i1 %2, label %IF1, label %ELSE1
+
+IF1:
+  %3 = shl i32  %1, 1
+  br label %ENDIF
+
+ELSE1:
+  %4 = lshr i32 %in, 1
+  br label %ENDIF
+
+ENDIF:
+  %5 = phi i32 [%in, %entry], [%3, %IF1], [%4, %ELSE1]
+  store i32 %5, i32 addrspace(1)* %out
+  ret void
+}
-- 
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