| Richard Sandiford | ca23271 | 2013-08-16 11:21:54 +0000 | [diff] [blame] | 1 | ; Test strcmp using CLST, i64 version. |
| 2 | ; |
| 3 | ; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s |
| 4 | |
| 5 | declare i64 @strcmp(i8 *%src1, i8 *%src2) |
| 6 | |
| 7 | ; Check a case where the result is used as an integer. |
| 8 | define i64 @f1(i8 *%src1, i8 *%src2) { |
| 9 | ; CHECK-LABEL: f1: |
| 10 | ; CHECK: lhi %r0, 0 |
| 11 | ; CHECK: [[LABEL:\.[^:]*]]: |
| 12 | ; CHECK: clst %r2, %r3 |
| 13 | ; CHECK-NEXT: jo [[LABEL]] |
| 14 | ; CHECK-NEXT: BB#{{[0-9]+}} |
| 15 | ; CHECK-NEXT: ipm [[REG:%r[0-5]]] |
| 16 | ; CHECK: srl [[REG]], 28 |
| 17 | ; CHECK: rll [[REG]], [[REG]], 31 |
| 18 | ; CHECK: lgfr %r2, [[REG]] |
| 19 | ; CHECK: br %r14 |
| 20 | %res = call i64 @strcmp(i8 *%src1, i8 *%src2) |
| 21 | ret i64 %res |
| 22 | } |
| 23 | |
| 24 | ; Check a case where the result is tested for equality. |
| 25 | define void @f2(i8 *%src1, i8 *%src2, i64 *%dest) { |
| 26 | ; CHECK-LABEL: f2: |
| 27 | ; CHECK: lhi %r0, 0 |
| 28 | ; CHECK: [[LABEL:\.[^:]*]]: |
| 29 | ; CHECK: clst %r2, %r3 |
| 30 | ; CHECK-NEXT: jo [[LABEL]] |
| 31 | ; CHECK-NEXT: BB#{{[0-9]+}} |
| 32 | ; CHECK-NEXT: je {{\.L.*}} |
| 33 | ; CHECK: br %r14 |
| 34 | %res = call i64 @strcmp(i8 *%src1, i8 *%src2) |
| 35 | %cmp = icmp eq i64 %res, 0 |
| 36 | br i1 %cmp, label %exit, label %store |
| 37 | |
| 38 | store: |
| 39 | store i64 0, i64 *%dest |
| 40 | br label %exit |
| 41 | |
| 42 | exit: |
| 43 | ret void |
| 44 | } |
| 45 | |
| 46 | ; Test a case where the result is used both as an integer and for |
| 47 | ; branching. |
| 48 | define i64 @f3(i8 *%src1, i8 *%src2, i64 *%dest) { |
| 49 | ; CHECK-LABEL: f3: |
| 50 | ; CHECK: lhi %r0, 0 |
| 51 | ; CHECK: [[LABEL:\.[^:]*]]: |
| 52 | ; CHECK: clst %r2, %r3 |
| 53 | ; CHECK-NEXT: jo [[LABEL]] |
| 54 | ; CHECK-NEXT: BB#{{[0-9]+}} |
| 55 | ; CHECK-NEXT: ipm [[REG:%r[0-5]]] |
| 56 | ; CHECK: srl [[REG]], 28 |
| 57 | ; CHECK: rll [[REG]], [[REG]], 31 |
| 58 | ; CHECK: lgfr %r2, [[REG]] |
| 59 | ; CHECK: jl {{\.L*}} |
| 60 | ; CHECK: br %r14 |
| 61 | entry: |
| 62 | %res = call i64 @strcmp(i8 *%src1, i8 *%src2) |
| 63 | %cmp = icmp slt i64 %res, 0 |
| 64 | br i1 %cmp, label %exit, label %store |
| 65 | |
| 66 | store: |
| 67 | store i64 0, i64 *%dest |
| 68 | br label %exit |
| 69 | |
| 70 | exit: |
| 71 | ret i64 %res |
| 72 | } |