[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-30.ll b/llvm/test/CodeGen/SystemZ/int-cmp-30.ll
new file mode 100644
index 0000000..713ad8e
--- /dev/null
+++ b/llvm/test/CodeGen/SystemZ/int-cmp-30.ll
@@ -0,0 +1,225 @@
+; Test 32-bit ordered comparisons that are really between a memory halfword
+; and a constant.
+;
+; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
+
+; Check unsigned comparison near the low end of the CLHHSI range, using zero
+; extension.
+define double @f1(double %a, double %b, i16 *%ptr) {
+; CHECK: f1:
+; CHECK: clhhsi 0(%r2), 1
+; CHECK-NEXT: j{{g?}}h
+; CHECK: br %r14
+ %val = load i16 *%ptr
+ %ext = zext i16 %val to i32
+ %cond = icmp ugt i32 %ext, 1
+ %res = select i1 %cond, double %a, double %b
+ ret double %res
+}
+
+; Check unsigned comparison near the low end of the CLHHSI range, using sign
+; extension.
+define double @f2(double %a, double %b, i16 *%ptr) {
+; CHECK: f2:
+; CHECK: clhhsi 0(%r2), 1
+; CHECK-NEXT: j{{g?}}h
+; CHECK: br %r14
+ %val = load i16 *%ptr
+ %ext = sext i16 %val to i32
+ %cond = icmp ugt i32 %ext, 1
+ %res = select i1 %cond, double %a, double %b
+ ret double %res
+}
+
+; Check unsigned comparison near the high end of the CLHHSI range, using zero
+; extension.
+define double @f3(double %a, double %b, i16 *%ptr) {
+; CHECK: f3:
+; CHECK: clhhsi 0(%r2), 65534
+; CHECK-NEXT: j{{g?}}l
+; CHECK: br %r14
+ %val = load i16 *%ptr
+ %ext = zext i16 %val to i32
+ %cond = icmp ult i32 %ext, 65534
+ %res = select i1 %cond, double %a, double %b
+ ret double %res
+}
+
+; Check unsigned comparison near the high end of the CLHHSI range, using sign
+; extension.
+define double @f4(double %a, double %b, i16 *%ptr) {
+; CHECK: f4:
+; CHECK: clhhsi 0(%r2), 65534
+; CHECK-NEXT: j{{g?}}l
+; CHECK: br %r14
+ %val = load i16 *%ptr
+ %ext = sext i16 %val to i32
+ %cond = icmp ult i32 %ext, -2
+ %res = select i1 %cond, double %a, double %b
+ ret double %res
+}
+
+; Check unsigned comparison above the high end of the CLHHSI range, using zero
+; extension. The condition is always true.
+define double @f5(double %a, double %b, i16 *%ptr) {
+; CHECK: f5:
+; CHECK-NOT: clhhsi
+; CHECK: br %r14
+ %val = load i16 *%ptr
+ %ext = zext i16 %val to i32
+ %cond = icmp ult i32 %ext, 65536
+ %res = select i1 %cond, double %a, double %b
+ ret double %res
+}
+
+; When using unsigned comparison with sign extension, equality with values
+; in the range [32768, MAX-32769] is impossible, and ordered comparisons with
+; those values are effectively sign tests. Since such comparisons are
+; unlikely to occur in practice, we don't bother optimizing the second case,
+; and simply ignore CLHHSI for this range. First check the low end of the
+; range.
+define double @f6(double %a, double %b, i16 *%ptr) {
+; CHECK: f6:
+; CHECK-NOT: clhhsi
+; CHECK: br %r14
+ %val = load i16 *%ptr
+ %ext = sext i16 %val to i32
+ %cond = icmp ult i32 %ext, 32768
+ %res = select i1 %cond, double %a, double %b
+ ret double %res
+}
+
+; ...and then the high end.
+define double @f7(double %a, double %b, i16 *%ptr) {
+; CHECK: f7:
+; CHECK-NOT: clhhsi
+; CHECK: br %r14
+ %val = load i16 *%ptr
+ %ext = sext i16 %val to i32
+ %cond = icmp ult i32 %ext, -32769
+ %res = select i1 %cond, double %a, double %b
+ ret double %res
+}
+
+; Check signed comparison near the low end of the CLHHSI range, using zero
+; extension. This is equivalent to unsigned comparison.
+define double @f8(double %a, double %b, i16 *%ptr) {
+; CHECK: f8:
+; CHECK: clhhsi 0(%r2), 1
+; CHECK-NEXT: j{{g?}}h
+; CHECK: br %r14
+ %val = load i16 *%ptr
+ %ext = zext i16 %val to i32
+ %cond = icmp sgt i32 %ext, 1
+ %res = select i1 %cond, double %a, double %b
+ ret double %res
+}
+
+; Check signed comparison near the low end of the CLHHSI range, using sign
+; extension. This should use CHHSI instead.
+define double @f9(double %a, double %b, i16 *%ptr) {
+; CHECK: f9:
+; CHECK: chhsi 0(%r2), 1
+; CHECK-NEXT: j{{g?}}h
+; CHECK: br %r14
+ %val = load i16 *%ptr
+ %ext = sext i16 %val to i32
+ %cond = icmp sgt i32 %ext, 1
+ %res = select i1 %cond, double %a, double %b
+ ret double %res
+}
+
+; Check signed comparison near the high end of the CLHHSI range, using zero
+; extension. This is equivalent to unsigned comparison.
+define double @f10(double %a, double %b, i16 *%ptr) {
+; CHECK: f10:
+; CHECK: clhhsi 0(%r2), 65534
+; CHECK-NEXT: j{{g?}}l
+; CHECK: br %r14
+ %val = load i16 *%ptr
+ %ext = zext i16 %val to i32
+ %cond = icmp slt i32 %ext, 65534
+ %res = select i1 %cond, double %a, double %b
+ ret double %res
+}
+
+; Check signed comparison near the high end of the CLHHSI range, using sign
+; extension. This should use CHHSI instead.
+define double @f11(double %a, double %b, i16 *%ptr) {
+; CHECK: f11:
+; CHECK: chhsi 0(%r2), -2
+; CHECK-NEXT: j{{g?}}l
+; CHECK: br %r14
+ %val = load i16 *%ptr
+ %ext = sext i16 %val to i32
+ %cond = icmp slt i32 %ext, -2
+ %res = select i1 %cond, double %a, double %b
+ ret double %res
+}
+
+; Check signed comparison above the high end of the CLHHSI range, using zero
+; extension. The condition is always true.
+define double @f12(double %a, double %b, i16 *%ptr) {
+; CHECK: f12:
+; CHECK-NOT: cli
+; CHECK: br %r14
+ %val = load i16 *%ptr
+ %ext = zext i16 %val to i32
+ %cond = icmp slt i32 %ext, 65536
+ %res = select i1 %cond, double %a, double %b
+ ret double %res
+}
+
+; Check signed comparison near the high end of the CHHSI range, using sign
+; extension.
+define double @f13(double %a, double %b, i16 *%ptr) {
+; CHECK: f13:
+; CHECK: chhsi 0(%r2), 32766
+; CHECK-NEXT: j{{g?}}l
+; CHECK: br %r14
+ %val = load i16 *%ptr
+ %ext = sext i16 %val to i32
+ %cond = icmp slt i32 %ext, 32766
+ %res = select i1 %cond, double %a, double %b
+ ret double %res
+}
+
+; Check signed comparison above the high end of the CHHSI range, using sign
+; extension. This condition is always true.
+define double @f14(double %a, double %b, i16 *%ptr) {
+; CHECK: f14:
+; CHECK-NOT: chhsi
+; CHECK: br %r14
+ %val = load i16 *%ptr
+ %ext = sext i16 %val to i32
+ %cond = icmp slt i32 %ext, 32768
+ %res = select i1 %cond, double %a, double %b
+ ret double %res
+}
+
+; Check signed comparison near the low end of the CHHSI range, using sign
+; extension.
+define double @f15(double %a, double %b, i16 *%ptr) {
+; CHECK: f15:
+; CHECK: chhsi 0(%r2), -32767
+; CHECK-NEXT: j{{g?}}g
+; CHECK: br %r14
+ %val = load i16 *%ptr
+ %ext = sext i16 %val to i32
+ %cond = icmp sgt i32 %ext, -32767
+ %res = select i1 %cond, double %a, double %b
+ ret double %res
+}
+
+; Check signed comparison below the low end of the CHHSI range, using sign
+; extension. This condition is always true.
+define double @f16(double %a, double %b, i16 *%ptr) {
+; CHECK: f16:
+; CHECK-NOT: chhsi
+; CHECK: br %r14
+ %val = load i16 *%ptr
+ %ext = sext i16 %val to i32
+ %cond = icmp sgt i32 %ext, -32769
+ %res = select i1 %cond, double %a, double %b
+ ret double %res
+}