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

[oota-llvm.git] / test / CodeGen / SystemZ / int-cmp-39.ll

diff --git a/test/CodeGen/SystemZ/int-cmp-39.ll b/test/CodeGen/SystemZ/int-cmp-39.ll
index 1129dce84a44e48ef2cbf16582ae6e5ba90eedc6..e99b240af8a6d8ce67666a7a4aa1e7def728daf1 100644 (file)
--- a/test/CodeGen/SystemZ/int-cmp-39.ll
+++ b/test/CodeGen/SystemZ/int-cmp-39.ll
@@ -4,12 +4,13 @@
 ; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
 
 @g = global i16 1
+@h = global i16 1, align 1, section "foo"
 
 ; Check signed comparison.
 define i64 @f1(i64 %src1) {
 ; CHECK: f1:
 ; CHECK: cghrl %r2, g
-; CHECK-NEXT: j{{g?}}l
+; CHECK-NEXT: jl
 ; CHECK: br %r14
 entry:
   %val = load i16 *@g
@@ -46,7 +47,7 @@ exit:
 define i64 @f3(i64 %src1) {
 ; CHECK: f3:
 ; CHECK: cghrl %r2, g
-; CHECK-NEXT: j{{g?}}e
+; CHECK-NEXT: je
 ; CHECK: br %r14
 entry:
   %val = load i16 *@g
@@ -65,7 +66,7 @@ exit:
 define i64 @f4(i64 %src1) {
 ; CHECK: f4:
 ; CHECK: cghrl %r2, g
-; CHECK-NEXT: j{{g?}}lh
+; CHECK-NEXT: jlh
 ; CHECK: br %r14
 entry:
   %val = load i16 *@g
@@ -79,3 +80,23 @@ exit:
   %res = phi i64 [ %src1, %entry ], [ %mul, %mulb ]
   ret i64 %res
 }
+
+; Repeat f1 with an unaligned address.
+define i64 @f5(i64 %src1) {
+; CHECK: f5:
+; CHECK: lgrl [[REG:%r[0-5]]], h@GOT
+; CHECK: cgh %r2, 0([[REG]])
+; CHECK-NEXT: jl
+; CHECK: br %r14
+entry:
+  %val = load i16 *@h, align 1
+  %src2 = sext i16 %val to i64
+  %cond = icmp slt i64 %src1, %src2
+  br i1 %cond, label %exit, label %mulb
+mulb:
+  %mul = mul i64 %src1, %src1
+  br label %exit
+exit:
+  %res = phi i64 [ %src1, %entry ], [ %mul, %mulb ]
+  ret i64 %res
+}