[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.
llvm-svn: 181204
diff --git a/llvm/test/CodeGen/SystemZ/int-cmp-16.ll b/llvm/test/CodeGen/SystemZ/int-cmp-16.ll
new file mode 100644
index 0000000..8af854e
--- /dev/null
+++ b/llvm/test/CodeGen/SystemZ/int-cmp-16.ll
@@ -0,0 +1,133 @@
+; Test 32-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 i32
+ %cond = icmp eq i32 %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 i32
+ %cond = icmp eq i32 %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 i32
+ %cond = icmp eq i32 %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 i32
+ %cond = icmp eq i32 %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 i32
+ %cond = icmp eq i32 %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 i32
+ %cond = icmp eq i32 %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 i32
+ %cond = icmp eq i32 %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 i32
+ %cond = icmp eq i32 %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 i32
+ %cond = icmp eq i32 %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 i32
+ %cond = icmp eq i32 %ext, -129
+ %res = select i1 %cond, double %a, double %b
+ ret double %res
+}