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e4dc717585
OnlyReadsMemoryFns tables are dead! We get more, and more accurate, information from gcc via the readnone and readonly function attributes. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44288 91177308-0d34-0410-b5e6-96231b3b80d8
128 lines
4.8 KiB
LLVM
128 lines
4.8 KiB
LLVM
; RUN: llvm-as < %s | opt -std-compile-opts | llvm-dis | \
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; RUN: %prcontext strstr 2 | grep -v declare | grep bb36.outer:
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@str = internal constant [68 x i8] c"Dot. date. datum. 123. Some more doubtful demonstration dummy data.\00" ; <[68 x i8]*> [#uses=1]
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@str1 = internal constant [5 x i8] c"ummy\00" ; <[5 x i8]*> [#uses=1]
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@str2 = internal constant [6 x i8] c" data\00" ; <[6 x i8]*> [#uses=1]
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@str3 = internal constant [3 x i8] c"by\00" ; <[3 x i8]*> [#uses=1]
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define i32 @stringSearch_Clib(i32 %count) {
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entry:
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%count_addr = alloca i32 ; <i32*> [#uses=2]
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%retval = alloca i32, align 4 ; <i32*> [#uses=2]
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%tmp = alloca i32, align 4 ; <i32*> [#uses=2]
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%i = alloca i32, align 4 ; <i32*> [#uses=5]
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%c = alloca i32, align 4 ; <i32*> [#uses=9]
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%j = alloca i32, align 4 ; <i32*> [#uses=4]
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%p = alloca i8*, align 4 ; <i8**> [#uses=6]
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%b = alloca [68 x i8], align 16 ; <[68 x i8]*> [#uses=6]
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%"alloca point" = bitcast i32 0 to i32 ; <i32> [#uses=0]
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store i32 %count, i32* %count_addr
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store i32 0, i32* %c
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%b1 = bitcast [68 x i8]* %b to i8* ; <i8*> [#uses=1]
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%tmp2 = getelementptr [68 x i8]* @str, i64 0, i64 0 ; <i8*> [#uses=1]
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call void @llvm.memcpy.i32( i8* %b1, i8* %tmp2, i32 68, i32 1 )
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store i32 0, i32* %j
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br label %bb41
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bb: ; preds = %bb41
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store i32 0, i32* %i
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%tmp3 = load i32* %i ; <i32> [#uses=1]
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store i32 %tmp3, i32* %c
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br label %bb36
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bb4: ; preds = %bb36
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%b5 = bitcast [68 x i8]* %b to i8* ; <i8*> [#uses=1]
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%tmp6 = getelementptr [5 x i8]* @str1, i64 0, i64 0 ; <i8*> [#uses=1]
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%tmp7 = call i8* @strstr( i8* %b5, i8* %tmp6 ) readonly ; <i8*> [#uses=1]
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store i8* %tmp7, i8** %p
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%tmp8 = load i8** %p ; <i8*> [#uses=1]
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%ttmp8 = icmp ne i8* %tmp8, null ; <i1> [#uses=1]
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%ttmp10 = zext i1 %ttmp8 to i8 ; <i8> [#uses=1]
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%ttmp7 = icmp ne i8 %ttmp10, 0 ; <i1> [#uses=1]
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br i1 %ttmp7, label %cond_true, label %cond_next
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cond_true: ; preds = %bb4
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%tmp9 = load i8** %p ; <i8*> [#uses=1]
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%tmp910 = ptrtoint i8* %tmp9 to i32 ; <i32> [#uses=1]
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%b11 = bitcast [68 x i8]* %b to i8* ; <i8*> [#uses=1]
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%b1112 = ptrtoint i8* %b11 to i32 ; <i32> [#uses=1]
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%tmp13 = sub i32 %tmp910, %b1112 ; <i32> [#uses=1]
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%tmp14 = load i32* %c ; <i32> [#uses=1]
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%tmp15 = add i32 %tmp13, %tmp14 ; <i32> [#uses=1]
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store i32 %tmp15, i32* %c
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br label %cond_next
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cond_next: ; preds = %cond_true, %bb4
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%b16 = bitcast [68 x i8]* %b to i8* ; <i8*> [#uses=1]
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%tmp17 = getelementptr [6 x i8]* @str2, i64 0, i64 0 ; <i8*> [#uses=1]
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%tmp18 = call i8* @strstr( i8* %b16, i8* %tmp17 ) readonly ; <i8*> [#uses=1]
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store i8* %tmp18, i8** %p
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%tmp19 = load i8** %p ; <i8*> [#uses=1]
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%ttmp6 = icmp ne i8* %tmp19, null ; <i1> [#uses=1]
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%ttmp9 = zext i1 %ttmp6 to i8 ; <i8> [#uses=1]
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%ttmp4 = icmp ne i8 %ttmp9, 0 ; <i1> [#uses=1]
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br i1 %ttmp4, label %cond_true20, label %cond_next28
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cond_true20: ; preds = %cond_next
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%tmp21 = load i8** %p ; <i8*> [#uses=1]
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%tmp2122 = ptrtoint i8* %tmp21 to i32 ; <i32> [#uses=1]
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%b23 = bitcast [68 x i8]* %b to i8* ; <i8*> [#uses=1]
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%b2324 = ptrtoint i8* %b23 to i32 ; <i32> [#uses=1]
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%tmp25 = sub i32 %tmp2122, %b2324 ; <i32> [#uses=1]
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%tmp26 = load i32* %c ; <i32> [#uses=1]
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%tmp27 = add i32 %tmp25, %tmp26 ; <i32> [#uses=1]
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store i32 %tmp27, i32* %c
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br label %cond_next28
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cond_next28: ; preds = %cond_true20, %cond_next
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%b29 = bitcast [68 x i8]* %b to i8* ; <i8*> [#uses=1]
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%tmp30 = getelementptr [3 x i8]* @str3, i64 0, i64 0 ; <i8*> [#uses=1]
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%tmp31 = call i32 @strcspn( i8* %b29, i8* %tmp30 ) readonly ; <i32> [#uses=1]
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%tmp32 = load i32* %c ; <i32> [#uses=1]
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%tmp33 = add i32 %tmp31, %tmp32 ; <i32> [#uses=1]
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store i32 %tmp33, i32* %c
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%tmp34 = load i32* %i ; <i32> [#uses=1]
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%tmp35 = add i32 %tmp34, 1 ; <i32> [#uses=1]
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store i32 %tmp35, i32* %i
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br label %bb36
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bb36: ; preds = %cond_next28, %bb
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%tmp37 = load i32* %i ; <i32> [#uses=1]
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%ttmp3 = icmp sle i32 %tmp37, 249 ; <i1> [#uses=1]
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%ttmp12 = zext i1 %ttmp3 to i8 ; <i8> [#uses=1]
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%ttmp1 = icmp ne i8 %ttmp12, 0 ; <i1> [#uses=1]
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br i1 %ttmp1, label %bb4, label %bb38
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bb38: ; preds = %bb36
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%tmp39 = load i32* %j ; <i32> [#uses=1]
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%tmp40 = add i32 %tmp39, 1 ; <i32> [#uses=1]
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store i32 %tmp40, i32* %j
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br label %bb41
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bb41: ; preds = %bb38, %entry
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%tmp42 = load i32* %j ; <i32> [#uses=1]
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%tmp43 = load i32* %count_addr ; <i32> [#uses=1]
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%ttmp2 = icmp slt i32 %tmp42, %tmp43 ; <i1> [#uses=1]
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%ttmp11 = zext i1 %ttmp2 to i8 ; <i8> [#uses=1]
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%ttmp5 = icmp ne i8 %ttmp11, 0 ; <i1> [#uses=1]
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br i1 %ttmp5, label %bb, label %bb44
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bb44: ; preds = %bb41
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%tmp45 = load i32* %c ; <i32> [#uses=1]
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store i32 %tmp45, i32* %tmp
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%tmp46 = load i32* %tmp ; <i32> [#uses=1]
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store i32 %tmp46, i32* %retval
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br label %return
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return: ; preds = %bb44
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%retval47 = load i32* %retval ; <i32> [#uses=1]
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ret i32 %retval47
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}
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declare void @llvm.memcpy.i32(i8*, i8*, i32, i32)
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declare i8* @strstr(i8*, i8*) readonly
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declare i32 @strcspn(i8*, i8*) readonly
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