Don't use a potentially expensive shift if all we want is one set bit.

[oota-llvm.git] / test / CodeGen / SystemZ / int-conv-01.ll

diff --git a/test/CodeGen/SystemZ/int-conv-01.ll b/test/CodeGen/SystemZ/int-conv-01.ll
index 643ac6ae2510f2f2a72159bcd8babb9a024a12a2..335cf7587df7cb21fe2e6f6766905cb493714c2e 100644 (file)
--- a/test/CodeGen/SystemZ/int-conv-01.ll
+++ b/test/CodeGen/SystemZ/int-conv-01.ll
@@ -6,7 +6,7 @@
 define i32 @f1(i32 %a) {
 ; CHECK: f1:
 ; CHECK: lbr %r2, %r2
-; CHECk: br %r14
+; CHECK: br %r14
   %byte = trunc i32 %a to i8
   %ext = sext i8 %byte to i32
   ret i32 %ext
@@ -16,7 +16,7 @@ define i32 @f1(i32 %a) {
 define i32 @f2(i64 %a) {
 ; CHECK: f2:
 ; CHECK: lbr %r2, %r2
-; CHECk: br %r14
+; CHECK: br %r14
   %byte = trunc i64 %a to i8
   %ext = sext i8 %byte to i32
   ret i32 %ext
@@ -103,3 +103,97 @@ define i32 @f9(i64 %src, i64 %index) {
   %ext = sext i8 %byte to i32
   ret i32 %ext
 }
+
+; Test a case where we spill the source of at least one LBR.  We want
+; to use LB if possible.
+define void @f10(i32 *%ptr) {
+; CHECK: f10:
+; CHECK: lb {{%r[0-9]+}}, 16{{[37]}}(%r15)
+; CHECK: br %r14
+  %val0 = load volatile i32 *%ptr
+  %val1 = load volatile i32 *%ptr
+  %val2 = load volatile i32 *%ptr
+  %val3 = load volatile i32 *%ptr
+  %val4 = load volatile i32 *%ptr
+  %val5 = load volatile i32 *%ptr
+  %val6 = load volatile i32 *%ptr
+  %val7 = load volatile i32 *%ptr
+  %val8 = load volatile i32 *%ptr
+  %val9 = load volatile i32 *%ptr
+  %val10 = load volatile i32 *%ptr
+  %val11 = load volatile i32 *%ptr
+  %val12 = load volatile i32 *%ptr
+  %val13 = load volatile i32 *%ptr
+  %val14 = load volatile i32 *%ptr
+  %val15 = load volatile i32 *%ptr
+
+  %trunc0 = trunc i32 %val0 to i8
+  %trunc1 = trunc i32 %val1 to i8
+  %trunc2 = trunc i32 %val2 to i8
+  %trunc3 = trunc i32 %val3 to i8
+  %trunc4 = trunc i32 %val4 to i8
+  %trunc5 = trunc i32 %val5 to i8
+  %trunc6 = trunc i32 %val6 to i8
+  %trunc7 = trunc i32 %val7 to i8
+  %trunc8 = trunc i32 %val8 to i8
+  %trunc9 = trunc i32 %val9 to i8
+  %trunc10 = trunc i32 %val10 to i8
+  %trunc11 = trunc i32 %val11 to i8
+  %trunc12 = trunc i32 %val12 to i8
+  %trunc13 = trunc i32 %val13 to i8
+  %trunc14 = trunc i32 %val14 to i8
+  %trunc15 = trunc i32 %val15 to i8
+
+  %ext0 = sext i8 %trunc0 to i32
+  %ext1 = sext i8 %trunc1 to i32
+  %ext2 = sext i8 %trunc2 to i32
+  %ext3 = sext i8 %trunc3 to i32
+  %ext4 = sext i8 %trunc4 to i32
+  %ext5 = sext i8 %trunc5 to i32
+  %ext6 = sext i8 %trunc6 to i32
+  %ext7 = sext i8 %trunc7 to i32
+  %ext8 = sext i8 %trunc8 to i32
+  %ext9 = sext i8 %trunc9 to i32
+  %ext10 = sext i8 %trunc10 to i32
+  %ext11 = sext i8 %trunc11 to i32
+  %ext12 = sext i8 %trunc12 to i32
+  %ext13 = sext i8 %trunc13 to i32
+  %ext14 = sext i8 %trunc14 to i32
+  %ext15 = sext i8 %trunc15 to i32
+
+  store volatile i32 %val0, i32 *%ptr
+  store volatile i32 %val1, i32 *%ptr
+  store volatile i32 %val2, i32 *%ptr
+  store volatile i32 %val3, i32 *%ptr
+  store volatile i32 %val4, i32 *%ptr
+  store volatile i32 %val5, i32 *%ptr
+  store volatile i32 %val6, i32 *%ptr
+  store volatile i32 %val7, i32 *%ptr
+  store volatile i32 %val8, i32 *%ptr
+  store volatile i32 %val9, i32 *%ptr
+  store volatile i32 %val10, i32 *%ptr
+  store volatile i32 %val11, i32 *%ptr
+  store volatile i32 %val12, i32 *%ptr
+  store volatile i32 %val13, i32 *%ptr
+  store volatile i32 %val14, i32 *%ptr
+  store volatile i32 %val15, i32 *%ptr
+
+  store volatile i32 %ext0, i32 *%ptr
+  store volatile i32 %ext1, i32 *%ptr
+  store volatile i32 %ext2, i32 *%ptr
+  store volatile i32 %ext3, i32 *%ptr
+  store volatile i32 %ext4, i32 *%ptr
+  store volatile i32 %ext5, i32 *%ptr
+  store volatile i32 %ext6, i32 *%ptr
+  store volatile i32 %ext7, i32 *%ptr
+  store volatile i32 %ext8, i32 *%ptr
+  store volatile i32 %ext9, i32 *%ptr
+  store volatile i32 %ext10, i32 *%ptr
+  store volatile i32 %ext11, i32 *%ptr
+  store volatile i32 %ext12, i32 *%ptr
+  store volatile i32 %ext13, i32 *%ptr
+  store volatile i32 %ext14, i32 *%ptr
+  store volatile i32 %ext15, i32 *%ptr
+
+  ret void
+}