This change handles a another case for generating the bic instruction
when a compile time constant is known. This occurs when implicitly zero
extending function arguments from 16 bits to 32 bits. The 8 bit case doesn't
need to be handled, as the 8 bit constants are encoded directly, thereby
not needing a separate load instruction to form the constant into a register.
<rdar://problem/11481151>
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@158659 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/CodeGen/ARM/bicZext.ll b/test/CodeGen/ARM/bicZext.ll
new file mode 100644
index 0000000..cf4b7ba
--- /dev/null
+++ b/test/CodeGen/ARM/bicZext.ll
@@ -0,0 +1,19 @@
+; RUN: llc %s -o - | FileCheck %s
+; ModuleID = 'bic.c'
+target triple = "thumbv7-apple-ios3.0.0"
+
+define zeroext i16 @foo16(i16 zeroext %f) nounwind readnone optsize ssp {
+entry:
+ ; CHECK: .thumb_func _foo16
+ ; CHECK: {{bic[^#]*#3}}
+ %and = and i16 %f, -4
+ ret i16 %and
+}
+
+define i32 @foo32(i32 %f) nounwind readnone optsize ssp {
+entry:
+ ; CHECK: .thumb_func _foo32
+ ; CHECK: {{bic[^#]*#3}}
+ %and = and i32 %f, -4
+ ret i32 %and
+}