1 ; RUN: llc < %s -mtriple=x86_64-linux | FileCheck %s 2 ; RUN: llc < %s -disable-simplify-libcalls -mtriple=x86_64-linux | FileCheck %s --check-prefix=NOBUILTIN 3 ; RUN: llc < %s -mtriple=x86_64-win32 | FileCheck %s 4 5 ; This tests codegen time inlining/optimization of memcmp 6 ; rdar://6480398 7 8 @.str = private constant [23 x i8] c"fooooooooooooooooooooo\00", align 1 ; <[23 x i8]*> [#uses=1] 9 10 declare i32 @memcmp(...) 11 12 define void @memcmp2(i8* %X, i8* %Y, i32* nocapture %P) nounwind { 13 entry: 14 %0 = tail call i32 (...)* @memcmp(i8* %X, i8* %Y, i32 2) nounwind ; <i32> [#uses=1] 15 %1 = icmp eq i32 %0, 0 ; <i1> [#uses=1] 16 br i1 %1, label %return, label %bb 17 18 bb: ; preds = %entry 19 store i32 4, i32* %P, align 4 20 ret void 21 22 return: ; preds = %entry 23 ret void 24 ; CHECK: memcmp2: 25 ; CHECK: movw ([[A0:%rdi|%rcx]]), %ax 26 ; CHECK: cmpw ([[A1:%rsi|%rdx]]), %ax 27 ; NOBUILTIN: memcmp2: 28 ; NOBUILTIN: callq 29 } 30 31 define void @memcmp2a(i8* %X, i32* nocapture %P) nounwind { 32 entry: 33 %0 = tail call i32 (...)* @memcmp(i8* %X, i8* getelementptr inbounds ([23 x i8]* @.str, i32 0, i32 1), i32 2) nounwind ; <i32> [#uses=1] 34 %1 = icmp eq i32 %0, 0 ; <i1> [#uses=1] 35 br i1 %1, label %return, label %bb 36 37 bb: ; preds = %entry 38 store i32 4, i32* %P, align 4 39 ret void 40 41 return: ; preds = %entry 42 ret void 43 ; CHECK: memcmp2a: 44 ; CHECK: cmpw $28527, ([[A0]]) 45 } 46 47 48 define void @memcmp4(i8* %X, i8* %Y, i32* nocapture %P) nounwind { 49 entry: 50 %0 = tail call i32 (...)* @memcmp(i8* %X, i8* %Y, i32 4) nounwind ; <i32> [#uses=1] 51 %1 = icmp eq i32 %0, 0 ; <i1> [#uses=1] 52 br i1 %1, label %return, label %bb 53 54 bb: ; preds = %entry 55 store i32 4, i32* %P, align 4 56 ret void 57 58 return: ; preds = %entry 59 ret void 60 ; CHECK: memcmp4: 61 ; CHECK: movl ([[A0]]), %eax 62 ; CHECK: cmpl ([[A1]]), %eax 63 } 64 65 define void @memcmp4a(i8* %X, i32* nocapture %P) nounwind { 66 entry: 67 %0 = tail call i32 (...)* @memcmp(i8* %X, i8* getelementptr inbounds ([23 x i8]* @.str, i32 0, i32 1), i32 4) nounwind ; <i32> [#uses=1] 68 %1 = icmp eq i32 %0, 0 ; <i1> [#uses=1] 69 br i1 %1, label %return, label %bb 70 71 bb: ; preds = %entry 72 store i32 4, i32* %P, align 4 73 ret void 74 75 return: ; preds = %entry 76 ret void 77 ; CHECK: memcmp4a: 78 ; CHECK: cmpl $1869573999, ([[A0]]) 79 } 80 81 define void @memcmp8(i8* %X, i8* %Y, i32* nocapture %P) nounwind { 82 entry: 83 %0 = tail call i32 (...)* @memcmp(i8* %X, i8* %Y, i32 8) nounwind ; <i32> [#uses=1] 84 %1 = icmp eq i32 %0, 0 ; <i1> [#uses=1] 85 br i1 %1, label %return, label %bb 86 87 bb: ; preds = %entry 88 store i32 4, i32* %P, align 4 89 ret void 90 91 return: ; preds = %entry 92 ret void 93 ; CHECK: memcmp8: 94 ; CHECK: movq ([[A0]]), %rax 95 ; CHECK: cmpq ([[A1]]), %rax 96 } 97 98 define void @memcmp8a(i8* %X, i32* nocapture %P) nounwind { 99 entry: 100 %0 = tail call i32 (...)* @memcmp(i8* %X, i8* getelementptr inbounds ([23 x i8]* @.str, i32 0, i32 0), i32 8) nounwind ; <i32> [#uses=1] 101 %1 = icmp eq i32 %0, 0 ; <i1> [#uses=1] 102 br i1 %1, label %return, label %bb 103 104 bb: ; preds = %entry 105 store i32 4, i32* %P, align 4 106 ret void 107 108 return: ; preds = %entry 109 ret void 110 ; CHECK: memcmp8a: 111 ; CHECK: movabsq $8029759185026510694, %rax 112 ; CHECK: cmpq %rax, ([[A0]]) 113 } 114 115
