1 files changed, 72 insertions, 0 deletions
diff --git a/test/CodeGen/Hexagon/cmp-promote.ll b/test/CodeGen/Hexagon/cmp-promote.ll
new file mode 100644
index 000000000000..7811b7e729cb
--- /dev/null
+++ b/test/CodeGen/Hexagon/cmp-promote.ll
@@ -0,0 +1,72 @@
+; RUN: llc -march=hexagon < %s | FileCheck %s
+;
+; Bug 6714. Use sign-extend to promote the arguments for compare
+; equal/not-equal for 8- and 16-bit types with negative constants.
+
+; CHECK: cmp.eq{{.*}}#-16
+define i32 @foo1(i16 signext %q) nounwind readnone {
+entry:
+  %not.cmp = icmp ne i16 %q, -16
+  %res.0 = zext i1 %not.cmp to i32
+  ret i32 %res.0
+}
+
+; CHECK: cmp.eq{{.*}}#-14
+define i32 @foo2(i16 signext %q) nounwind readnone {
+entry:
+  %cmp = icmp eq i16 %q, -14
+  %res.0 = select i1 %cmp, i32 2, i32 0
+  ret i32 %res.0
+}
+
+; CHECK: cmp.eq{{.*}}#-8
+define i32 @foo3(i8 signext %r) nounwind readnone {
+entry:
+  %cmp = icmp eq i8 %r, -8
+  %res.0 = select i1 %cmp, i32 0, i32 3
+  ret i32 %res.0
+}
+
+; CHECK: cmp.eq{{.*}}#-6
+define i32 @foo4(i8 signext %r) nounwind readnone {
+entry:
+  %cmp = icmp eq i8 %r, -6
+  %res.0 = select i1 %cmp, i32 4, i32 0
+  ret i32 %res.0
+}
+
+; CHECK: cmp.eq{{.*}}#-20
+define i32 @foo5(i32 %s) nounwind readnone {
+entry:
+  %cmp = icmp eq i32 %s, -20
+  %res.0 = select i1 %cmp, i32 0, i32 5
+  ret i32 %res.0
+}
+
+; CHECK: cmp.eq{{.*}}#-18
+define i32 @foo6(i32 %s) nounwind readnone {
+entry:
+  %cmp = icmp eq i32 %s, -18
+  %res.0 = select i1 %cmp, i32 6, i32 0
+  ret i32 %res.0
+}
+
+; CHECK: cmp.eq{{.*}}#10
+define i32 @foo7(i16 signext %q) nounwind readnone {
+entry:
+  %cmp = icmp eq i16 %q, 10
+  %res.0 = select i1 %cmp, i32 7, i32 0
+  ret i32 %res.0
+}
+
+@g = external global i16
+
+; CHECK: cmp.eq{{.*}}#-12
+define i32 @foo8() nounwind readonly {
+entry:
+  %0 = load i16, i16* @g, align 2
+  %cmp = icmp eq i16 %0, -12
+  %res.0 = select i1 %cmp, i32 0, i32 8
+  ret i32 %res.0
+}
+