| Chris Lattner | 8047d9a | 2009-12-24 00:37:38 +0000 | [diff] [blame^] | 1 | ; RUN: llc %s -o - -march=x86-64 | FileCheck %s |
| 2 | |
| 3 | ; This tests codegen time inlining/optimization of memcmp |
| 4 | ; rdar://6480398 |
| 5 | |
| 6 | @.str = private constant [6 x i8] c"fooxx\00", align 1 ; <[6 x i8]*> [#uses=1] |
| 7 | |
| 8 | declare i32 @memcmp(...) |
| 9 | |
| 10 | define void @memcmp2(i8* %X, i8* %Y, i32* nocapture %P) nounwind { |
| 11 | entry: |
| 12 | %0 = tail call i32 (...)* @memcmp(i8* %X, i8* %Y, i32 2) nounwind ; <i32> [#uses=1] |
| 13 | %1 = icmp eq i32 %0, 0 ; <i1> [#uses=1] |
| 14 | br i1 %1, label %return, label %bb |
| 15 | |
| 16 | bb: ; preds = %entry |
| 17 | store i32 4, i32* %P, align 4 |
| 18 | ret void |
| 19 | |
| 20 | return: ; preds = %entry |
| 21 | ret void |
| 22 | ; CHECK: memcmp2: |
| 23 | ; CHECK: movw (%rsi), %ax |
| 24 | ; CHECK: cmpw %ax, (%rdi) |
| 25 | } |
| 26 | |
| 27 | define void @memcmp2a(i8* %X, i32* nocapture %P) nounwind { |
| 28 | entry: |
| 29 | %0 = tail call i32 (...)* @memcmp(i8* %X, i8* getelementptr inbounds ([6 x i8]* @.str, i32 0, i32 1), i32 2) nounwind ; <i32> [#uses=1] |
| 30 | %1 = icmp eq i32 %0, 0 ; <i1> [#uses=1] |
| 31 | br i1 %1, label %return, label %bb |
| 32 | |
| 33 | bb: ; preds = %entry |
| 34 | store i32 4, i32* %P, align 4 |
| 35 | ret void |
| 36 | |
| 37 | return: ; preds = %entry |
| 38 | ret void |
| 39 | ; CHECK: memcmp2a: |
| 40 | ; CHECK: cmpw $28527, (%rdi) |
| 41 | } |
| 42 | |
| 43 | |
| 44 | define void @memcmp4(i8* %X, i8* %Y, i32* nocapture %P) nounwind { |
| 45 | entry: |
| 46 | %0 = tail call i32 (...)* @memcmp(i8* %X, i8* %Y, i32 4) nounwind ; <i32> [#uses=1] |
| 47 | %1 = icmp eq i32 %0, 0 ; <i1> [#uses=1] |
| 48 | br i1 %1, label %return, label %bb |
| 49 | |
| 50 | bb: ; preds = %entry |
| 51 | store i32 4, i32* %P, align 4 |
| 52 | ret void |
| 53 | |
| 54 | return: ; preds = %entry |
| 55 | ret void |
| 56 | ; CHECK: memcmp4: |
| 57 | ; CHECK: movl (%rsi), %eax |
| 58 | ; CHECK: cmpl %eax, (%rdi) |
| 59 | } |
| 60 | |
| 61 | define void @memcmp4a(i8* %X, i32* nocapture %P) nounwind { |
| 62 | entry: |
| 63 | %0 = tail call i32 (...)* @memcmp(i8* %X, i8* getelementptr inbounds ([6 x i8]* @.str, i32 0, i32 1), i32 4) nounwind ; <i32> [#uses=1] |
| 64 | %1 = icmp eq i32 %0, 0 ; <i1> [#uses=1] |
| 65 | br i1 %1, label %return, label %bb |
| 66 | |
| 67 | bb: ; preds = %entry |
| 68 | store i32 4, i32* %P, align 4 |
| 69 | ret void |
| 70 | |
| 71 | return: ; preds = %entry |
| 72 | ret void |
| 73 | ; CHECK: memcmp4a: |
| 74 | ; CHECK: cmpl $2021158767, (%rdi) |
| 75 | } |
| 76 | |