[SystemZ] Add comparisons of large immediates using high words

There are no corresponding patterns for small immediates because they would
prevent the use of fused compare-and-branch instructions.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191775 91177308-0d34-0410-b5e6-96231b3b80d8

5 files changed, 114 insertions, 0 deletions

diff --git a/test/CodeGen/SystemZ/asm-18.ll b/test/CodeGen/SystemZ/asm-18.ll
index e16bf65c3e..d39de6d655 100644
--- a/test/CodeGen/SystemZ/asm-18.ll
+++ b/test/CodeGen/SystemZ/asm-18.ll
@@ -669,3 +669,37 @@ define void @f30() {
   call void asm sideeffect "stepd $0", "r"(i32 %add3)
   ret void
 }
+
+; Test large immediate comparison involving high registers.
+define i32 @f31() {
+; CHECK-LABEL: f31:
+; CHECK: stepa [[REG1:%r[0-5]]]
+; CHECK: cih [[REG1]], 1000000000
+; CHECK: stepb [[REG2:%r[0-5]]]
+; CHECK: clih [[REG2]], 1000000000
+; CHECK: br %r14
+  %res1 = call i32 asm "stepa $0", "=h"()
+  %cmp1 = icmp sle i32 %res1, 1000000000
+  %sel1 = select i1 %cmp1, i32 0, i32 1
+  %res2 = call i32 asm "stepb $0, $1", "=h,r"(i32 %sel1)
+  %cmp2 = icmp ule i32 %res2, 1000000000
+  %sel2 = select i1 %cmp2, i32 0, i32 1
+  ret i32 %sel2
+}
+
+; Test large immediate comparison involving low registers.
+define i32 @f32() {
+; CHECK-LABEL: f32:
+; CHECK: stepa [[REG1:%r[0-5]]]
+; CHECK: cfi [[REG1]], 1000000000
+; CHECK: stepb [[REG2:%r[0-5]]]
+; CHECK: clfi [[REG2]], 1000000000
+; CHECK: br %r14
+  %res1 = call i32 asm "stepa $0", "=r"()
+  %cmp1 = icmp sle i32 %res1, 1000000000
+  %sel1 = select i1 %cmp1, i32 0, i32 1
+  %res2 = call i32 asm "stepb $0, $1", "=r,r"(i32 %sel1)
+  %cmp2 = icmp ule i32 %res2, 1000000000
+  %sel2 = select i1 %cmp2, i32 0, i32 1
+  ret i32 %sel2
+}
diff --git a/test/MC/Disassembler/SystemZ/insns.txt b/test/MC/Disassembler/SystemZ/insns.txt
index 2f2e7fa0cd..f88531b2cd 100644
--- a/test/MC/Disassembler/SystemZ/insns.txt
+++ b/test/MC/Disassembler/SystemZ/insns.txt
@@ -1351,6 +1351,24 @@
 # CHECK: chy %r15, 0
 0xe3 0xf0 0x00 0x00 0x00 0x79
 
+# CHECK: cih %r0, -2147483648
+0xcc 0x0d 0x80 0x00 0x00 0x00
+
+# CHECK: cih %r0, -1
+0xcc 0x0d 0xff 0xff 0xff 0xff
+
+# CHECK: cih %r0, 0
+0xcc 0x0d 0x00 0x00 0x00 0x00
+
+# CHECK: cih %r0, 1
+0xcc 0x0d 0x00 0x00 0x00 0x01
+
+# CHECK: cih %r0, 2147483647
+0xcc 0x0d 0x7f 0xff 0xff 0xff
+
+# CHECK: cih %r15, 0
+0xcc 0xfd 0x00 0x00 0x00 0x00
+
 # CHECK: clc 0(1), 0
 0xd5 0x00 0x00 0x00 0x00 0x00
 
@@ -1573,6 +1591,18 @@
 # CHECK: cli 4095(%r15), 42
 0x95 0x2a 0xff 0xff
 
+# CHECK: clih %r0, 0
+0xcc 0x0f 0x00 0x00 0x00 0x00
+
+# CHECK: clih %r0, 1
+0xcc 0x0f 0x00 0x00 0x00 0x01
+
+# CHECK: clih %r0, 4294967295
+0xcc 0x0f 0xff 0xff 0xff 0xff
+
+# CHECK: clih %r15, 0
+0xcc 0xff 0x00 0x00 0x00 0x00
+
 # CHECK: cliy -524288, 0
 0xeb 0x00 0x00 0x00 0x80 0x55
 
diff --git a/test/MC/SystemZ/insn-bad-z196.s b/test/MC/SystemZ/insn-bad-z196.s
index 24640018a5..e387f149fd 100644
--- a/test/MC/SystemZ/insn-bad-z196.s
+++ b/test/MC/SystemZ/insn-bad-z196.s
@@ -33,6 +33,22 @@
 	aih	%r0, (1 << 31)
 
 #CHECK: error: invalid operand
+#CHECK: cih	%r0, (-1 << 31) - 1
+#CHECK: error: invalid operand
+#CHECK: cih	%r0, (1 << 31)
+
+	cih	%r0, (-1 << 31) - 1
+	cih	%r0, (1 << 31)
+
+#CHECK: error: invalid operand
+#CHECK: clih	%r0, -1
+#CHECK: error: invalid operand
+#CHECK: clih	%r0, (1 << 32)
+
+	clih	%r0, -1
+	clih	%r0, (1 << 32)
+
+#CHECK: error: invalid operand
 #CHECK: fidbra	%f0, 0, %f0, -1
 #CHECK: error: invalid operand
 #CHECK: fidbra	%f0, 0, %f0, 16
diff --git a/test/MC/SystemZ/insn-bad.s b/test/MC/SystemZ/insn-bad.s
index eadb9f0997..8de20612ca 100644
--- a/test/MC/SystemZ/insn-bad.s
+++ b/test/MC/SystemZ/insn-bad.s
@@ -679,6 +679,11 @@
 	chy	%r0, -524289
 	chy	%r0, 524288
 
+#CHECK: error: {{(instruction requires: high-word)?}}
+#CHECK: cih	%r0, 0
+
+	cih	%r0, 0
+
 #CHECK: error: invalid operand
 #CHECK: cij	%r0, -129, 0, 0
 #CHECK: error: invalid operand
@@ -961,6 +966,11 @@
 	cli	0, -1
 	cli	0, 256
 
+#CHECK: error: {{(instruction requires: high-word)?}}
+#CHECK: clih	%r0, 0
+
+	clih	%r0, 0
+
 #CHECK: error: invalid operand
 #CHECK: clij	%r0, -1, 0, 0
 #CHECK: error: invalid operand
diff --git a/test/MC/SystemZ/insn-good-z196.s b/test/MC/SystemZ/insn-good-z196.s
index 2bc27bd58a..93687ea81f 100644
--- a/test/MC/SystemZ/insn-good-z196.s
+++ b/test/MC/SystemZ/insn-good-z196.s
@@ -135,6 +135,30 @@
 	ark	%r15,%r0,%r0
 	ark	%r7,%r8,%r9
 
+#CHECK: cih	%r0, -2147483648        # encoding: [0xcc,0x0d,0x80,0x00,0x00,0x00]
+#CHECK: cih	%r0, -1                 # encoding: [0xcc,0x0d,0xff,0xff,0xff,0xff]
+#CHECK: cih	%r0, 0                  # encoding: [0xcc,0x0d,0x00,0x00,0x00,0x00]
+#CHECK: cih	%r0, 1                  # encoding: [0xcc,0x0d,0x00,0x00,0x00,0x01]
+#CHECK: cih	%r0, 2147483647         # encoding: [0xcc,0x0d,0x7f,0xff,0xff,0xff]
+#CHECK: cih	%r15, 0                 # encoding: [0xcc,0xfd,0x00,0x00,0x00,0x00]
+
+	cih	%r0, -1 << 31
+	cih	%r0, -1
+	cih	%r0, 0
+	cih	%r0, 1
+	cih	%r0, (1 << 31) - 1
+	cih	%r15, 0
+
+#CHECK: clih	%r0, 0                  # encoding: [0xcc,0x0f,0x00,0x00,0x00,0x00]
+#CHECK: clih	%r0, 1                  # encoding: [0xcc,0x0f,0x00,0x00,0x00,0x01]
+#CHECK: clih	%r0, 4294967295         # encoding: [0xcc,0x0f,0xff,0xff,0xff,0xff]
+#CHECK: clih	%r15, 0                 # encoding: [0xcc,0xff,0x00,0x00,0x00,0x00]
+
+	clih	%r0, 0
+	clih	%r0, 1
+	clih	%r0, (1 << 32) - 1
+	clih	%r15, 0
+
 #CHECK: fidbra	%f0, 0, %f0, 0          # encoding: [0xb3,0x5f,0x00,0x00]
 #CHECK: fidbra	%f0, 0, %f0, 15         # encoding: [0xb3,0x5f,0x0f,0x00]
 #CHECK: fidbra	%f0, 0, %f15, 0         # encoding: [0xb3,0x5f,0x00,0x0f]