[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

1 files changed, 135 insertions, 0 deletions

diff --git a/llvm/test/CodeGen/SystemZ/int-cmp-09.ll b/llvm/test/CodeGen/SystemZ/int-cmp-09.ll
new file mode 100644
index 00000000000..bb7213c6a43
--- /dev/null
+++ b/llvm/test/CodeGen/SystemZ/int-cmp-09.ll
@@ -0,0 +1,135 @@
+; Test 32-bit signed comparison in which the second operand is constant.
+;
+; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
+
+; Check comparisons with 0.
+define double @f1(double %a, double %b, i32 %i1) {
+; CHECK: f1:
+; CHECK: chi %r2, 0
+; CHECK-NEXT: j{{g?}}l
+; CHECK: ldr %f0, %f2
+; CHECK: br %r14
+  %cond = icmp slt i32 %i1, 0
+  %res = select i1 %cond, double %a, double %b
+  ret double %res
+}
+
+; Check comparisons with 1.
+define double @f2(double %a, double %b, i32 %i1) {
+; CHECK: f2:
+; CHECK: chi %r2, 1
+; CHECK-NEXT: j{{g?}}l
+; CHECK: ldr %f0, %f2
+; CHECK: br %r14
+  %cond = icmp slt i32 %i1, 1
+  %res = select i1 %cond, double %a, double %b
+  ret double %res
+}
+
+; Check the high end of the CHI range.
+define double @f3(double %a, double %b, i32 %i1) {
+; CHECK: f3:
+; CHECK: chi %r2, 32767
+; CHECK-NEXT: j{{g?}}l
+; CHECK: ldr %f0, %f2
+; CHECK: br %r14
+  %cond = icmp slt i32 %i1, 32767
+  %res = select i1 %cond, double %a, double %b
+  ret double %res
+}
+
+; Check the next value up, which must use CFI.
+define double @f4(double %a, double %b, i32 %i1) {
+; CHECK: f4:
+; CHECK: cfi %r2, 32768
+; CHECK-NEXT: j{{g?}}l
+; CHECK: ldr %f0, %f2
+; CHECK: br %r14
+  %cond = icmp slt i32 %i1, 32768
+  %res = select i1 %cond, double %a, double %b
+  ret double %res
+}
+
+; Check the high end of the signed 32-bit range.
+define double @f5(double %a, double %b, i32 %i1) {
+; CHECK: f5:
+; CHECK: cfi %r2, 2147483647
+; CHECK-NEXT: j{{g?}}e
+; CHECK: ldr %f0, %f2
+; CHECK: br %r14
+  %cond = icmp eq i32 %i1, 2147483647
+  %res = select i1 %cond, double %a, double %b
+  ret double %res
+}
+
+; Check the next value up, which should be treated as a negative value.
+define double @f6(double %a, double %b, i32 %i1) {
+; CHECK: f6:
+; CHECK: cfi %r2, -2147483648
+; CHECK-NEXT: j{{g?}}e
+; CHECK: ldr %f0, %f2
+; CHECK: br %r14
+  %cond = icmp eq i32 %i1, 2147483648
+  %res = select i1 %cond, double %a, double %b
+  ret double %res
+}
+
+; Check the high end of the negative CHI range.
+define double @f7(double %a, double %b, i32 %i1) {
+; CHECK: f7:
+; CHECK: chi %r2, -1
+; CHECK-NEXT: j{{g?}}l
+; CHECK: ldr %f0, %f2
+; CHECK: br %r14
+  %cond = icmp slt i32 %i1, -1
+  %res = select i1 %cond, double %a, double %b
+  ret double %res
+}
+
+; Check the low end of the CHI range.
+define double @f8(double %a, double %b, i32 %i1) {
+; CHECK: f8:
+; CHECK: chi %r2, -32768
+; CHECK-NEXT: j{{g?}}l
+; CHECK: ldr %f0, %f2
+; CHECK: br %r14
+  %cond = icmp slt i32 %i1, -32768
+  %res = select i1 %cond, double %a, double %b
+  ret double %res
+}
+
+; Check the next value down, which must use CFI instead.
+define double @f9(double %a, double %b, i32 %i1) {
+; CHECK: f9:
+; CHECK: cfi %r2, -32769
+; CHECK-NEXT: j{{g?}}l
+; CHECK: ldr %f0, %f2
+; CHECK: br %r14
+  %cond = icmp slt i32 %i1, -32769
+  %res = select i1 %cond, double %a, double %b
+  ret double %res
+}
+
+; Check the low end of the signed 32-bit range.
+define double @f10(double %a, double %b, i32 %i1) {
+; CHECK: f10:
+; CHECK: cfi %r2, -2147483648
+; CHECK-NEXT: j{{g?}}e
+; CHECK: ldr %f0, %f2
+; CHECK: br %r14
+  %cond = icmp eq i32 %i1, -2147483648
+  %res = select i1 %cond, double %a, double %b
+  ret double %res
+}
+
+; Check the next value down, which should be treated as a positive value.
+define double @f11(double %a, double %b, i32 %i1) {
+; CHECK: f11:
+; CHECK: cfi %r2, 2147483647
+; CHECK-NEXT: j{{g?}}e
+; CHECK: ldr %f0, %f2
+; CHECK: br %r14
+  %cond = icmp eq i32 %i1, -2147483649
+  %res = select i1 %cond, double %a, double %b
+  ret double %res
+}