Make JumpThreading smart enough to properly thread StrSwitch when it's compiled with clang++.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112198 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 162 insertions, 0 deletions

diff --git a/test/Transforms/JumpThreading/2010-08-26-and.ll b/test/Transforms/JumpThreading/2010-08-26-and.ll
new file mode 100644
index 0000000..17a0aba
--- /dev/null
+++ b/test/Transforms/JumpThreading/2010-08-26-and.ll
@@ -0,0 +1,162 @@
+; RUN: opt -jump-threading -enable-jump-threading-lvi -S < %s | FileCheck %s
+
+target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
+target triple = "x86_64-apple-darwin10.0.0"
+
+%class.StringSwitch = type { i8*, i32, i32, i8 }
+
+@.str = private constant [4 x i8] c"red\00"       ; <[4 x i8]*> [#uses=1]
+@.str1 = private constant [7 x i8] c"orange\00"   ; <[7 x i8]*> [#uses=1]
+@.str2 = private constant [7 x i8] c"yellow\00"   ; <[7 x i8]*> [#uses=1]
+@.str3 = private constant [6 x i8] c"green\00"    ; <[6 x i8]*> [#uses=1]
+@.str4 = private constant [5 x i8] c"blue\00"     ; <[5 x i8]*> [#uses=1]
+@.str5 = private constant [7 x i8] c"indigo\00"   ; <[7 x i8]*> [#uses=1]
+@.str6 = private constant [7 x i8] c"violet\00"   ; <[7 x i8]*> [#uses=1]
+@.str7 = private constant [12 x i8] c"Color = %d\0A\00" ; <[12 x i8]*> [#uses=1]
+
+define i32 @main(i32 %argc, i8** nocapture %argv) nounwind ssp {
+entry:
+  %cmp142 = icmp sgt i32 %argc, 1                 ; <i1> [#uses=1]
+  br i1 %cmp142, label %bb.nph, label %for.end
+
+bb.nph:                                           ; preds = %entry
+  %tmp = add i32 %argc, -2                        ; <i32> [#uses=1]
+  %tmp144 = zext i32 %tmp to i64                  ; <i64> [#uses=1]
+  %tmp145 = add i64 %tmp144, 1                    ; <i64> [#uses=1]
+  br label %land.lhs.true.i
+
+land.lhs.true.i:                                  ; preds = %_ZN12StringSwitchI5ColorE4CaseILj7EEERS1_RAT__KcRKS0_.exit134, %bb.nph
+  %retval.0.i.pre161 = phi i32 [ undef, %bb.nph ], [ %retval.0.i.pre, %_ZN12StringSwitchI5ColorE4CaseILj7EEERS1_RAT__KcRKS0_.exit134 ] ; <i32> [#uses=3]
+  %indvar = phi i64 [ 0, %bb.nph ], [ %tmp146, %_ZN12StringSwitchI5ColorE4CaseILj7EEERS1_RAT__KcRKS0_.exit134 ] ; <i64> [#uses=1]
+  %tmp146 = add i64 %indvar, 1                    ; <i64> [#uses=3]
+  %arrayidx = getelementptr i8** %argv, i64 %tmp146 ; <i8**> [#uses=1]
+  %tmp6 = load i8** %arrayidx, align 8            ; <i8*> [#uses=8]
+  %call.i.i = call i64 @strlen(i8* %tmp6) nounwind ; <i64> [#uses=1]
+  %conv.i.i = trunc i64 %call.i.i to i32          ; <i32> [#uses=6]\
+; CHECK: switch i32 %conv.i.i
+; CHECK-NOT: if.then.i40
+; CHECK: }
+  switch i32 %conv.i.i, label %_ZN12StringSwitchI5ColorE4CaseILj7EEERS1_RAT__KcRKS0_.exit [
+    i32 3, label %land.lhs.true5.i
+    i32 6, label %land.lhs.true5.i37
+  ]
+
+land.lhs.true5.i:                                 ; preds = %land.lhs.true.i
+  %call.i = call i32 @memcmp(i8* getelementptr inbounds ([4 x i8]* @.str, i64 0, i64 0), i8* %tmp6, i64 4) nounwind ; <i32> [#uses=1]
+  %cmp9.i = icmp eq i32 %call.i, 0                ; <i1> [#uses=1]
+  br i1 %cmp9.i, label %_ZN12StringSwitchI5ColorE4CaseILj4EEERS1_RAT__KcRKS0_.exit, label %_ZN12StringSwitchI5ColorE4CaseILj7EEERS1_RAT__KcRKS0_.exit
+
+_ZN12StringSwitchI5ColorE4CaseILj4EEERS1_RAT__KcRKS0_.exit: ; preds = %land.lhs.true5.i
+  br label %_ZN12StringSwitchI5ColorE4CaseILj7EEERS1_RAT__KcRKS0_.exit
+
+land.lhs.true5.i37:                               ; preds = %land.lhs.true.i
+  %call.i35 = call i32 @memcmp(i8* getelementptr inbounds ([7 x i8]* @.str1, i64 0, i64 0), i8* %tmp6, i64 7) nounwind ; <i32> [#uses=1]
+  %cmp9.i36 = icmp eq i32 %call.i35, 0            ; <i1> [#uses=1]
+  br i1 %cmp9.i36, label %if.then.i40, label %_ZN12StringSwitchI5ColorE4CaseILj7EEERS1_RAT__KcRKS0_.exit
+
+if.then.i40:                                      ; preds = %land.lhs.true5.i37
+  br label %_ZN12StringSwitchI5ColorE4CaseILj7EEERS1_RAT__KcRKS0_.exit
+
+_ZN12StringSwitchI5ColorE4CaseILj7EEERS1_RAT__KcRKS0_.exit: ; preds = %if.then.i40, %land.lhs.true5.i37, %_ZN12StringSwitchI5ColorE4CaseILj4EEERS1_RAT__KcRKS0_.exit, %land.lhs.true5.i, %land.lhs.true.i
+  %retval.0.i.pre159 = phi i32 [ 1, %_ZN12StringSwitchI5ColorE4CaseILj4EEERS1_RAT__KcRKS0_.exit ], [ %retval.0.i.pre161, %land.lhs.true5.i37 ], [ 2, %if.then.i40 ], [ %retval.0.i.pre161, %land.lhs.true5.i ], [ %retval.0.i.pre161, %land.lhs.true.i ] ; <i32> [#uses=2]
+  %tmp2.i44 = phi i8 [ 1, %_ZN12StringSwitchI5ColorE4CaseILj4EEERS1_RAT__KcRKS0_.exit ], [ 0, %land.lhs.true5.i37 ], [ 1, %if.then.i40 ], [ 0, %land.lhs.true5.i ], [ 0, %land.lhs.true.i ] ; <i8> [#uses=3]
+  %tobool.i46 = icmp eq i8 %tmp2.i44, 0           ; <i1> [#uses=1]
+  %cmp.i49 = icmp eq i32 %conv.i.i, 6             ; <i1> [#uses=1]
+  %or.cond = and i1 %tobool.i46, %cmp.i49         ; <i1> [#uses=1]
+  br i1 %or.cond, label %land.lhs.true5.i55, label %_ZN12StringSwitchI5ColorE4CaseILj7EEERS1_RAT__KcRKS0_.exit60
+
+land.lhs.true5.i55:                               ; preds = %_ZN12StringSwitchI5ColorE4CaseILj7EEERS1_RAT__KcRKS0_.exit
+  %call.i53 = call i32 @memcmp(i8* getelementptr inbounds ([7 x i8]* @.str2, i64 0, i64 0), i8* %tmp6, i64 7) nounwind ; <i32> [#uses=1]
+  %cmp9.i54 = icmp eq i32 %call.i53, 0            ; <i1> [#uses=1]
+  br i1 %cmp9.i54, label %if.then.i58, label %_ZN12StringSwitchI5ColorE4CaseILj7EEERS1_RAT__KcRKS0_.exit60
+
+if.then.i58:                                      ; preds = %land.lhs.true5.i55
+  br label %_ZN12StringSwitchI5ColorE4CaseILj7EEERS1_RAT__KcRKS0_.exit60
+
+_ZN12StringSwitchI5ColorE4CaseILj7EEERS1_RAT__KcRKS0_.exit60: ; preds = %if.then.i58, %land.lhs.true5.i55, %_ZN12StringSwitchI5ColorE4CaseILj7EEERS1_RAT__KcRKS0_.exit
+  %retval.0.i.pre158 = phi i32 [ %retval.0.i.pre159, %_ZN12StringSwitchI5ColorE4CaseILj7EEERS1_RAT__KcRKS0_.exit ], [ %retval.0.i.pre159, %land.lhs.true5.i55 ], [ 3, %if.then.i58 ] ; <i32> [#uses=2]
+  %tmp2.i63 = phi i8 [ %tmp2.i44, %_ZN12StringSwitchI5ColorE4CaseILj7EEERS1_RAT__KcRKS0_.exit ], [ %tmp2.i44, %land.lhs.true5.i55 ], [ 1, %if.then.i58 ] ; <i8> [#uses=3]
+  %tmp14.i64 = and i8 %tmp2.i63, 1                ; <i8> [#uses=1]
+  %tobool.i65 = icmp eq i8 %tmp14.i64, 0          ; <i1> [#uses=1]
+  %cmp.i68 = icmp eq i32 %conv.i.i, 5             ; <i1> [#uses=1]
+  %or.cond168 = and i1 %tobool.i65, %cmp.i68      ; <i1> [#uses=1]
+  br i1 %or.cond168, label %land.lhs.true5.i74, label %_ZN12StringSwitchI5ColorE4CaseILj6EEERS1_RAT__KcRKS0_.exit
+
+land.lhs.true5.i74:                               ; preds = %_ZN12StringSwitchI5ColorE4CaseILj7EEERS1_RAT__KcRKS0_.exit60
+  %call.i72 = call i32 @memcmp(i8* getelementptr inbounds ([6 x i8]* @.str3, i64 0, i64 0), i8* %tmp6, i64 6) nounwind ; <i32> [#uses=1]
+  %cmp9.i73 = icmp eq i32 %call.i72, 0            ; <i1> [#uses=1]
+  br i1 %cmp9.i73, label %if.then.i77, label %_ZN12StringSwitchI5ColorE4CaseILj6EEERS1_RAT__KcRKS0_.exit
+
+if.then.i77:                                      ; preds = %land.lhs.true5.i74
+  br label %_ZN12StringSwitchI5ColorE4CaseILj6EEERS1_RAT__KcRKS0_.exit
+
+_ZN12StringSwitchI5ColorE4CaseILj6EEERS1_RAT__KcRKS0_.exit: ; preds = %if.then.i77, %land.lhs.true5.i74, %_ZN12StringSwitchI5ColorE4CaseILj7EEERS1_RAT__KcRKS0_.exit60
+  %retval.0.i.pre157 = phi i32 [ %retval.0.i.pre158, %_ZN12StringSwitchI5ColorE4CaseILj7EEERS1_RAT__KcRKS0_.exit60 ], [ %retval.0.i.pre158, %land.lhs.true5.i74 ], [ 4, %if.then.i77 ] ; <i32> [#uses=2]
+  %tmp2.i81 = phi i8 [ %tmp2.i63, %_ZN12StringSwitchI5ColorE4CaseILj7EEERS1_RAT__KcRKS0_.exit60 ], [ %tmp2.i63, %land.lhs.true5.i74 ], [ 1, %if.then.i77 ] ; <i8> [#uses=3]
+  %tmp14.i82 = and i8 %tmp2.i81, 1                ; <i8> [#uses=1]
+  %tobool.i83 = icmp eq i8 %tmp14.i82, 0          ; <i1> [#uses=1]
+  %cmp.i86 = icmp eq i32 %conv.i.i, 4             ; <i1> [#uses=1]
+  %or.cond169 = and i1 %tobool.i83, %cmp.i86      ; <i1> [#uses=1]
+  br i1 %or.cond169, label %land.lhs.true5.i92, label %_ZN12StringSwitchI5ColorE4CaseILj5EEERS1_RAT__KcRKS0_.exit
+
+land.lhs.true5.i92:                               ; preds = %_ZN12StringSwitchI5ColorE4CaseILj6EEERS1_RAT__KcRKS0_.exit
+  %call.i90 = call i32 @memcmp(i8* getelementptr inbounds ([5 x i8]* @.str4, i64 0, i64 0), i8* %tmp6, i64 5) nounwind ; <i32> [#uses=1]
+  %cmp9.i91 = icmp eq i32 %call.i90, 0            ; <i1> [#uses=1]
+  br i1 %cmp9.i91, label %if.then.i95, label %_ZN12StringSwitchI5ColorE4CaseILj5EEERS1_RAT__KcRKS0_.exit
+
+if.then.i95:                                      ; preds = %land.lhs.true5.i92
+  br label %_ZN12StringSwitchI5ColorE4CaseILj5EEERS1_RAT__KcRKS0_.exit
+
+_ZN12StringSwitchI5ColorE4CaseILj5EEERS1_RAT__KcRKS0_.exit: ; preds = %if.then.i95, %land.lhs.true5.i92, %_ZN12StringSwitchI5ColorE4CaseILj6EEERS1_RAT__KcRKS0_.exit
+  %retval.0.i.pre156 = phi i32 [ %retval.0.i.pre157, %_ZN12StringSwitchI5ColorE4CaseILj6EEERS1_RAT__KcRKS0_.exit ], [ %retval.0.i.pre157, %land.lhs.true5.i92 ], [ 5, %if.then.i95 ] ; <i32> [#uses=2]
+  %tmp2.i99 = phi i8 [ %tmp2.i81, %_ZN12StringSwitchI5ColorE4CaseILj6EEERS1_RAT__KcRKS0_.exit ], [ %tmp2.i81, %land.lhs.true5.i92 ], [ 1, %if.then.i95 ] ; <i8> [#uses=3]
+  %tmp14.i100 = and i8 %tmp2.i99, 1               ; <i8> [#uses=1]
+  %tobool.i101 = icmp eq i8 %tmp14.i100, 0        ; <i1> [#uses=1]
+  %cmp.i104 = icmp eq i32 %conv.i.i, 6            ; <i1> [#uses=1]
+  %or.cond170 = and i1 %tobool.i101, %cmp.i104    ; <i1> [#uses=1]
+  br i1 %or.cond170, label %land.lhs.true5.i110, label %_ZN12StringSwitchI5ColorE4CaseILj7EEERS1_RAT__KcRKS0_.exit115
+
+land.lhs.true5.i110:                              ; preds = %_ZN12StringSwitchI5ColorE4CaseILj5EEERS1_RAT__KcRKS0_.exit
+  %call.i108 = call i32 @memcmp(i8* getelementptr inbounds ([7 x i8]* @.str5, i64 0, i64 0), i8* %tmp6, i64 7) nounwind ; <i32> [#uses=1]
+  %cmp9.i109 = icmp eq i32 %call.i108, 0          ; <i1> [#uses=1]
+  br i1 %cmp9.i109, label %if.then.i113, label %_ZN12StringSwitchI5ColorE4CaseILj7EEERS1_RAT__KcRKS0_.exit115
+
+if.then.i113:                                     ; preds = %land.lhs.true5.i110
+  br label %_ZN12StringSwitchI5ColorE4CaseILj7EEERS1_RAT__KcRKS0_.exit115
+
+_ZN12StringSwitchI5ColorE4CaseILj7EEERS1_RAT__KcRKS0_.exit115: ; preds = %if.then.i113, %land.lhs.true5.i110, %_ZN12StringSwitchI5ColorE4CaseILj5EEERS1_RAT__KcRKS0_.exit
+  %retval.0.i.pre155 = phi i32 [ %retval.0.i.pre156, %_ZN12StringSwitchI5ColorE4CaseILj5EEERS1_RAT__KcRKS0_.exit ], [ %retval.0.i.pre156, %land.lhs.true5.i110 ], [ 6, %if.then.i113 ] ; <i32> [#uses=2]
+  %tmp2.i118 = phi i8 [ %tmp2.i99, %_ZN12StringSwitchI5ColorE4CaseILj5EEERS1_RAT__KcRKS0_.exit ], [ %tmp2.i99, %land.lhs.true5.i110 ], [ 1, %if.then.i113 ] ; <i8> [#uses=3]
+  %tmp14.i119 = and i8 %tmp2.i118, 1              ; <i8> [#uses=1]
+  %tobool.i120 = icmp eq i8 %tmp14.i119, 0        ; <i1> [#uses=1]
+  %cmp.i123 = icmp eq i32 %conv.i.i, 6            ; <i1> [#uses=1]
+  %or.cond171 = and i1 %tobool.i120, %cmp.i123    ; <i1> [#uses=1]
+  br i1 %or.cond171, label %land.lhs.true5.i129, label %_ZN12StringSwitchI5ColorE4CaseILj7EEERS1_RAT__KcRKS0_.exit134
+
+land.lhs.true5.i129:                              ; preds = %_ZN12StringSwitchI5ColorE4CaseILj7EEERS1_RAT__KcRKS0_.exit115
+  %call.i127 = call i32 @memcmp(i8* getelementptr inbounds ([7 x i8]* @.str6, i64 0, i64 0), i8* %tmp6, i64 7) nounwind ; <i32> [#uses=1]
+  %cmp9.i128 = icmp eq i32 %call.i127, 0          ; <i1> [#uses=1]
+  br i1 %cmp9.i128, label %if.then.i132, label %_ZN12StringSwitchI5ColorE4CaseILj7EEERS1_RAT__KcRKS0_.exit134
+
+if.then.i132:                                     ; preds = %land.lhs.true5.i129
+  br label %_ZN12StringSwitchI5ColorE4CaseILj7EEERS1_RAT__KcRKS0_.exit134
+
+_ZN12StringSwitchI5ColorE4CaseILj7EEERS1_RAT__KcRKS0_.exit134: ; preds = %if.then.i132, %land.lhs.true5.i129, %_ZN12StringSwitchI5ColorE4CaseILj7EEERS1_RAT__KcRKS0_.exit115
+  %retval.0.i.pre = phi i32 [ %retval.0.i.pre155, %_ZN12StringSwitchI5ColorE4CaseILj7EEERS1_RAT__KcRKS0_.exit115 ], [ %retval.0.i.pre155, %land.lhs.true5.i129 ], [ 7, %if.then.i132 ] ; <i32> [#uses=2]
+  %tmp2.i137 = phi i8 [ %tmp2.i118, %_ZN12StringSwitchI5ColorE4CaseILj7EEERS1_RAT__KcRKS0_.exit115 ], [ %tmp2.i118, %land.lhs.true5.i129 ], [ 1, %if.then.i132 ] ; <i8> [#uses=1]
+  %tmp7.i138 = and i8 %tmp2.i137, 1               ; <i8> [#uses=1]
+  %tobool.i139 = icmp eq i8 %tmp7.i138, 0         ; <i1> [#uses=1]
+  %retval.0.i = select i1 %tobool.i139, i32 0, i32 %retval.0.i.pre ; <i32> [#uses=1]
+  %call22 = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([12 x i8]* @.str7, i64 0, i64 0), i32 %retval.0.i) ; <i32> [#uses=0]
+  %exitcond = icmp eq i64 %tmp146, %tmp145        ; <i1> [#uses=1]
+  br i1 %exitcond, label %for.end, label %land.lhs.true.i
+
+for.end:                                          ; preds = %_ZN12StringSwitchI5ColorE4CaseILj7EEERS1_RAT__KcRKS0_.exit134, %entry
+  ret i32 0
+}
+
+declare i32 @printf(i8* nocapture, ...) nounwind
+
+declare i32 @memcmp(i8* nocapture, i8* nocapture, i64) nounwind readonly
+
+declare i64 @strlen(i8* nocapture) nounwind readonly