[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, 110 insertions, 0 deletions

diff --git a/llvm/test/CodeGen/SystemZ/fp-move-04.ll b/llvm/test/CodeGen/SystemZ/fp-move-04.ll
new file mode 100644
index 00000000000..72e90d1fffd
--- /dev/null
+++ b/llvm/test/CodeGen/SystemZ/fp-move-04.ll
@@ -0,0 +1,110 @@
+; Test 64-bit floating-point loads.
+;
+; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
+
+; Test the low end of the LD range.
+define double @f1(double *%src) {
+; CHECK: f1:
+; CHECK: ld %f0, 0(%r2)
+; CHECK: br %r14
+  %val = load double *%src
+  ret double %val
+}
+
+; Test the high end of the LD range.
+define double @f2(double *%src) {
+; CHECK: f2:
+; CHECK: ld %f0, 4088(%r2)
+; CHECK: br %r14
+  %ptr = getelementptr double *%src, i64 511
+  %val = load double *%ptr
+  ret double %val
+}
+
+; Check the next doubleword up, which should use LDY instead of LD.
+define double @f3(double *%src) {
+; CHECK: f3:
+; CHECK: ldy %f0, 4096(%r2)
+; CHECK: br %r14
+  %ptr = getelementptr double *%src, i64 512
+  %val = load double *%ptr
+  ret double %val
+}
+
+; Check the high end of the aligned LDY range.
+define double @f4(double *%src) {
+; CHECK: f4:
+; CHECK: ldy %f0, 524280(%r2)
+; CHECK: br %r14
+  %ptr = getelementptr double *%src, i64 65535
+  %val = load double *%ptr
+  ret double %val
+}
+
+; Check the next doubleword up, which needs separate address logic.
+; Other sequences besides this one would be OK.
+define double @f5(double *%src) {
+; CHECK: f5:
+; CHECK: agfi %r2, 524288
+; CHECK: ld %f0, 0(%r2)
+; CHECK: br %r14
+  %ptr = getelementptr double *%src, i64 65536
+  %val = load double *%ptr
+  ret double %val
+}
+
+; Check the high end of the negative aligned LDY range.
+define double @f6(double *%src) {
+; CHECK: f6:
+; CHECK: ldy %f0, -8(%r2)
+; CHECK: br %r14
+  %ptr = getelementptr double *%src, i64 -1
+  %val = load double *%ptr
+  ret double %val
+}
+
+; Check the low end of the LDY range.
+define double @f7(double *%src) {
+; CHECK: f7:
+; CHECK: ldy %f0, -524288(%r2)
+; CHECK: br %r14
+  %ptr = getelementptr double *%src, i64 -65536
+  %val = load double *%ptr
+  ret double %val
+}
+
+; Check the next doubleword down, which needs separate address logic.
+; Other sequences besides this one would be OK.
+define double @f8(double *%src) {
+; CHECK: f8:
+; CHECK: agfi %r2, -524296
+; CHECK: ld %f0, 0(%r2)
+; CHECK: br %r14
+  %ptr = getelementptr double *%src, i64 -65537
+  %val = load double *%ptr
+  ret double %val
+}
+
+; Check that LD allows an index.
+define double @f9(i64 %src, i64 %index) {
+; CHECK: f9:
+; CHECK: ld %f0, 4095({{%r3,%r2|%r2,%r3}})
+; CHECK: br %r14
+  %add1 = add i64 %src, %index
+  %add2 = add i64 %add1, 4095
+  %ptr = inttoptr i64 %add2 to double *
+  %val = load double *%ptr
+  ret double %val
+}
+
+; Check that LDY allows an index.
+define double @f10(i64 %src, i64 %index) {
+; CHECK: f10:
+; CHECK: ldy %f0, 4096({{%r3,%r2|%r2,%r3}})
+; CHECK: br %r14
+  %add1 = add i64 %src, %index
+  %add2 = add i64 %add1, 4096
+  %ptr = inttoptr i64 %add2 to double *
+  %val = load double *%ptr
+  ret double %val
+}