[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, 64 insertions, 0 deletions

diff --git a/test/CodeGen/SystemZ/int-mul-07.ll b/test/CodeGen/SystemZ/int-mul-07.ll
new file mode 100644
index 0000000000..2459cc3599
--- /dev/null
+++ b/test/CodeGen/SystemZ/int-mul-07.ll
@@ -0,0 +1,64 @@
+; Test high-part i32->i64 multiplications.
+;
+; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
+
+; We don't provide *MUL_LOHI or MULH* for the patterns in this file,
+; but they should at least still work.
+
+; Check zero-extended multiplication in which only the high part is used.
+define i32 @f1(i32 %a, i32 %b) {
+; CHECK: f1:
+; CHECK: msgr
+; CHECK: br %r14
+  %ax = zext i32 %a to i64
+  %bx = zext i32 %b to i64
+  %mulx = mul i64 %ax, %bx
+  %highx = lshr i64 %mulx, 32
+  %high = trunc i64 %highx to i32
+  ret i32 %high
+}
+
+; Check sign-extended multiplication in which only the high part is used.
+define i32 @f2(i32 %a, i32 %b) {
+; CHECK: f2:
+; CHECK: msgfr
+; CHECK: br %r14
+  %ax = sext i32 %a to i64
+  %bx = sext i32 %b to i64
+  %mulx = mul i64 %ax, %bx
+  %highx = lshr i64 %mulx, 32
+  %high = trunc i64 %highx to i32
+  ret i32 %high
+}
+
+; Check zero-extended multiplication in which the result is split into
+; high and low halves.
+define i32 @f3(i32 %a, i32 %b) {
+; CHECK: f3:
+; CHECK: msgr
+; CHECK: br %r14
+  %ax = zext i32 %a to i64
+  %bx = zext i32 %b to i64
+  %mulx = mul i64 %ax, %bx
+  %highx = lshr i64 %mulx, 32
+  %high = trunc i64 %highx to i32
+  %low = trunc i64 %mulx to i32
+  %or = or i32 %high, %low
+  ret i32 %or
+}
+
+; Check sign-extended multiplication in which the result is split into
+; high and low halves.
+define i32 @f4(i32 %a, i32 %b) {
+; CHECK: f4:
+; CHECK: msgfr
+; CHECK: br %r14
+  %ax = sext i32 %a to i64
+  %bx = sext i32 %b to i64
+  %mulx = mul i64 %ax, %bx
+  %highx = lshr i64 %mulx, 32
+  %high = trunc i64 %highx to i32
+  %low = trunc i64 %mulx to i32
+  %or = or i32 %high, %low
+  ret i32 %or
+}