; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
declare i32 @foo()
+@g1 = global i16 0
define void @f1(i32 %target) {
-; CHECK: f1:
+; CHECK-LABEL: f1:
; CHECK: .cfi_def_cfa_offset
; CHECK: .L[[LABEL:.*]]:
; CHECK: crje %r2, {{%r[0-9]+}}, .L[[LABEL]]
}
define void @f2(i32 %target) {
-; CHECK: f2:
+; CHECK-LABEL: f2:
; CHECK: .cfi_def_cfa_offset
; CHECK: .L[[LABEL:.*]]:
; CHECK: crjlh %r2, {{%r[0-9]+}}, .L[[LABEL]]
}
define void @f3(i32 %target) {
-; CHECK: f3:
+; CHECK-LABEL: f3:
; CHECK: .cfi_def_cfa_offset
; CHECK: .L[[LABEL:.*]]:
; CHECK: crjle %r2, {{%r[0-9]+}}, .L[[LABEL]]
}
define void @f4(i32 %target) {
-; CHECK: f4:
+; CHECK-LABEL: f4:
; CHECK: .cfi_def_cfa_offset
; CHECK: .L[[LABEL:.*]]:
; CHECK: crjl %r2, {{%r[0-9]+}}, .L[[LABEL]]
}
define void @f5(i32 %target) {
-; CHECK: f5:
+; CHECK-LABEL: f5:
; CHECK: .cfi_def_cfa_offset
; CHECK: .L[[LABEL:.*]]:
; CHECK: crjh %r2, {{%r[0-9]+}}, .L[[LABEL]]
}
define void @f6(i32 %target) {
-; CHECK: f6:
+; CHECK-LABEL: f6:
; CHECK: .cfi_def_cfa_offset
; CHECK: .L[[LABEL:.*]]:
; CHECK: crjhe %r2, {{%r[0-9]+}}, .L[[LABEL]]
exit:
ret void
}
+
+; Check that CRJ is used for checking equality with a zero-extending
+; character load.
+define void @f7(i8 *%targetptr) {
+; CHECK-LABEL: f7:
+; CHECK: .cfi_def_cfa_offset
+; CHECK: .L[[LABEL:.*]]:
+; CHECK: llc [[REG:%r[0-5]]],
+; CHECK: crje %r2, [[REG]], .L[[LABEL]]
+ br label %loop
+loop:
+ %val = call i32 @foo()
+ %byte = load i8 *%targetptr
+ %target = zext i8 %byte to i32
+ %cond = icmp eq i32 %val, %target
+ br i1 %cond, label %loop, label %exit
+exit:
+ ret void
+}
+
+; ...and zero-extending i16 loads.
+define void @f8(i16 *%targetptr) {
+; CHECK-LABEL: f8:
+; CHECK: .cfi_def_cfa_offset
+; CHECK: .L[[LABEL:.*]]:
+; CHECK: llh [[REG:%r[0-5]]],
+; CHECK: crje %r2, [[REG]], .L[[LABEL]]
+ br label %loop
+loop:
+ %val = call i32 @foo()
+ %half = load i16 *%targetptr
+ %target = zext i16 %half to i32
+ %cond = icmp eq i32 %val, %target
+ br i1 %cond, label %loop, label %exit
+exit:
+ ret void
+}
+
+; ...unless the address is a global.
+define void @f9(i16 *%targetptr) {
+; CHECK-LABEL: f9:
+; CHECK: .cfi_def_cfa_offset
+; CHECK: .L[[LABEL:.*]]:
+; CHECK: clhrl %r2, g1
+; CHECK: je .L[[LABEL]]
+ br label %loop
+loop:
+ %val = call i32 @foo()
+ %half = load i16 *@g1
+ %target = zext i16 %half to i32
+ %cond = icmp eq i32 %val, %target
+ br i1 %cond, label %loop, label %exit
+exit:
+ ret void
+}
+
+; Check that CRJ is used for checking order between two zero-extending
+; byte loads, even if the original comparison was unsigned.
+define void @f10(i8 *%targetptr1) {
+; CHECK-LABEL: f10:
+; CHECK: .cfi_def_cfa_offset
+; CHECK: .L[[LABEL:.*]]:
+; CHECK-DAG: llc [[REG1:%r[0-5]]], 0(
+; CHECK-DAG: llc [[REG2:%r[0-5]]], 1(
+; CHECK: crjl [[REG1]], [[REG2]], .L[[LABEL]]
+ br label %loop
+loop:
+ %val = call i32 @foo()
+ %targetptr2 = getelementptr i8 *%targetptr1, i64 1
+ %byte1 = load i8 *%targetptr1
+ %byte2 = load i8 *%targetptr2
+ %ext1 = zext i8 %byte1 to i32
+ %ext2 = zext i8 %byte2 to i32
+ %cond = icmp ult i32 %ext1, %ext2
+ br i1 %cond, label %loop, label %exit
+exit:
+ ret void
+}
+
+; ...likewise halfword loads.
+define void @f11(i16 *%targetptr1) {
+; CHECK-LABEL: f11:
+; CHECK: .cfi_def_cfa_offset
+; CHECK: .L[[LABEL:.*]]:
+; CHECK-DAG: llh [[REG1:%r[0-5]]], 0(
+; CHECK-DAG: llh [[REG2:%r[0-5]]], 2(
+; CHECK: crjl [[REG1]], [[REG2]], .L[[LABEL]]
+ br label %loop
+loop:
+ %val = call i32 @foo()
+ %targetptr2 = getelementptr i16 *%targetptr1, i64 1
+ %half1 = load i16 *%targetptr1
+ %half2 = load i16 *%targetptr2
+ %ext1 = zext i16 %half1 to i32
+ %ext2 = zext i16 %half2 to i32
+ %cond = icmp ult i32 %ext1, %ext2
+ br i1 %cond, label %loop, label %exit
+exit:
+ ret void
+}