LegalizeDAG: Respect the result of TLI.getBooleanContents() when expanding SETCC

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176695 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 26 insertions, 0 deletions

diff --git a/test/CodeGen/R600/legalizedag-bug-expand-setcc.ll b/test/CodeGen/R600/legalizedag-bug-expand-setcc.ll
new file mode 100644
index 0000000000..1aae7f9f91
--- /dev/null
+++ b/test/CodeGen/R600/legalizedag-bug-expand-setcc.ll
@@ -0,0 +1,26 @@
+; RUN: llc < %s -march=r600 -mcpu=redwood | FileCheck %s
+
+; This tests a bug where LegalizeDAG was not checking the target's
+; BooleanContents value and always using one for true, when expanding
+; setcc to select_cc.
+;
+; This bug caused the icmp IR instruction to be expanded to two machine
+; instructions, when only one is needed.
+;
+
+; CHECK: @setcc_expand
+; CHECK: SET
+; CHECK-NOT: CND
+define void @setcc_expand(i32 addrspace(1)* %out, i32 %in) {
+entry:
+  %0 = icmp eq i32 %in, 5
+  br i1 %0, label %IF, label %ENDIF
+IF:
+  %1 = getelementptr i32 addrspace(1)* %out, i32 1
+  store i32 0, i32 addrspace(1)* %1
+  br label %ENDIF
+
+ENDIF:
+  store i32 0, i32 addrspace(1)* %out
+  ret void
+}