[SystemZ] Add CodeGen test cases

This adds all CodeGen tests for the SystemZ target.

This version of the patch incorporates feedback from a review by
Sean Silva.  Thanks to all reviewers!

Patch by Richard Sandiford.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@181204 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 81 insertions, 0 deletions

diff --git a/test/CodeGen/SystemZ/int-cmp-39.ll b/test/CodeGen/SystemZ/int-cmp-39.ll
new file mode 100644
index 0000000000..1129dce84a
--- /dev/null
+++ b/test/CodeGen/SystemZ/int-cmp-39.ll
@@ -0,0 +1,81 @@
+; Test 64-bit comparisons in which the second operand is sign-extended
+; from a PC-relative i16.
+;
+; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
+
+@g = global i16 1
+
+; Check signed comparison.
+define i64 @f1(i64 %src1) {
+; CHECK: f1:
+; CHECK: cghrl %r2, g
+; CHECK-NEXT: j{{g?}}l
+; CHECK: br %r14
+entry:
+  %val = load i16 *@g
+  %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
+}
+
+; Check unsigned comparison, which cannot use CHRL.
+define i64 @f2(i64 %src1) {
+; CHECK: f2:
+; CHECK-NOT: cghrl
+; CHECK: br %r14
+entry:
+  %val = load i16 *@g
+  %src2 = sext i16 %val to i64
+  %cond = icmp ult 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
+}
+
+; Check equality.
+define i64 @f3(i64 %src1) {
+; CHECK: f3:
+; CHECK: cghrl %r2, g
+; CHECK-NEXT: j{{g?}}e
+; CHECK: br %r14
+entry:
+  %val = load i16 *@g
+  %src2 = sext i16 %val to i64
+  %cond = icmp eq 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
+}
+
+; Check inequality.
+define i64 @f4(i64 %src1) {
+; CHECK: f4:
+; CHECK: cghrl %r2, g
+; CHECK-NEXT: j{{g?}}lh
+; CHECK: br %r14
+entry:
+  %val = load i16 *@g
+  %src2 = sext i16 %val to i64
+  %cond = icmp ne 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
+}