[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, 133 insertions, 0 deletions

diff --git a/test/CodeGen/SystemZ/int-cmp-18.ll b/test/CodeGen/SystemZ/int-cmp-18.ll
new file mode 100644
index 00000000000..9822dc21224
--- /dev/null
+++ b/test/CodeGen/SystemZ/int-cmp-18.ll
@@ -0,0 +1,133 @@
+; Test 64-bit equality comparisons that are really between a memory byte
+; and a constant.
+;
+; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
+
+; Check the low end of the 8-bit unsigned range, with zero extension.
+define double @f1(double %a, double %b, i8 *%ptr) {
+; CHECK: f1:
+; CHECK: cli 0(%r2), 0
+; CHECK-NEXT: j{{g?}}e
+; CHECK: br %r14
+  %val = load i8 *%ptr
+  %ext = zext i8 %val to i64
+  %cond = icmp eq i64 %ext, 0
+  %res = select i1 %cond, double %a, double %b
+  ret double %res
+}
+
+; Check the high end of the 8-bit unsigned range, with zero extension.
+define double @f2(double %a, double %b, i8 *%ptr) {
+; CHECK: f2:
+; CHECK: cli 0(%r2), 255
+; CHECK-NEXT: j{{g?}}e
+; CHECK: br %r14
+  %val = load i8 *%ptr
+  %ext = zext i8 %val to i64
+  %cond = icmp eq i64 %ext, 255
+  %res = select i1 %cond, double %a, double %b
+  ret double %res
+}
+
+; Check the next value up, with zero extension.  The condition is always false.
+define double @f3(double %a, double %b, i8 *%ptr) {
+; CHECK: f3:
+; CHECK-NOT: cli
+; CHECK: br %r14
+  %val = load i8 *%ptr
+  %ext = zext i8 %val to i64
+  %cond = icmp eq i64 %ext, 256
+  %res = select i1 %cond, double %a, double %b
+  ret double %res
+}
+
+; Check comparisons with -1, with zero extension.
+; This condition is also always false.
+define double @f4(double %a, double %b, i8 *%ptr) {
+; CHECK: f4:
+; CHECK-NOT: cli
+; CHECK: br %r14
+  %val = load i8 *%ptr
+  %ext = zext i8 %val to i64
+  %cond = icmp eq i64 %ext, -1
+  %res = select i1 %cond, double %a, double %b
+  ret double %res
+}
+
+; Check comparisons with 0, using sign extension.
+define double @f5(double %a, double %b, i8 *%ptr) {
+; CHECK: f5:
+; CHECK: cli 0(%r2), 0
+; CHECK-NEXT: j{{g?}}e
+; CHECK: br %r14
+  %val = load i8 *%ptr
+  %ext = sext i8 %val to i64
+  %cond = icmp eq i64 %ext, 0
+  %res = select i1 %cond, double %a, double %b
+  ret double %res
+}
+
+; Check the high end of the signed 8-bit range, using sign extension.
+define double @f6(double %a, double %b, i8 *%ptr) {
+; CHECK: f6:
+; CHECK: cli 0(%r2), 127
+; CHECK-NEXT: j{{g?}}e
+; CHECK: br %r14
+  %val = load i8 *%ptr
+  %ext = sext i8 %val to i64
+  %cond = icmp eq i64 %ext, 127
+  %res = select i1 %cond, double %a, double %b
+  ret double %res
+}
+
+; Check the next value up, using sign extension.
+; The condition is always false.
+define double @f7(double %a, double %b, i8 *%ptr) {
+; CHECK: f7:
+; CHECK-NOT: cli
+; CHECK: br %r14
+  %val = load i8 *%ptr
+  %ext = sext i8 %val to i64
+  %cond = icmp eq i64 %ext, 128
+  %res = select i1 %cond, double %a, double %b
+  ret double %res
+}
+
+; Check comparisons with -1, using sign extension.
+define double @f8(double %a, double %b, i8 *%ptr) {
+; CHECK: f8:
+; CHECK: cli 0(%r2), 255
+; CHECK-NEXT: j{{g?}}e
+; CHECK: br %r14
+  %val = load i8 *%ptr
+  %ext = sext i8 %val to i64
+  %cond = icmp eq i64 %ext, -1
+  %res = select i1 %cond, double %a, double %b
+  ret double %res
+}
+
+; Check the low end of the signed 8-bit range, using sign extension.
+define double @f9(double %a, double %b, i8 *%ptr) {
+; CHECK: f9:
+; CHECK: cli 0(%r2), 128
+; CHECK-NEXT: j{{g?}}e
+; CHECK: br %r14
+  %val = load i8 *%ptr
+  %ext = sext i8 %val to i64
+  %cond = icmp eq i64 %ext, -128
+  %res = select i1 %cond, double %a, double %b
+  ret double %res
+}
+
+; Check the next value down, using sign extension.
+; The condition is always false.
+define double @f10(double %a, double %b, i8 *%ptr) {
+; CHECK: f10:
+; CHECK-NOT: cli
+; CHECK: br %r14
+  %val = load i8 *%ptr
+  %ext = sext i8 %val to i64
+  %cond = icmp eq i64 %ext, -129
+  %res = select i1 %cond, double %a, double %b
+  ret double %res
+}