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- ; RUN: opt < %s -indvars
- ; PR4436
- target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:32:32"
- target triple = "i386-pc-linux-gnu"
- define i8* @string_expandtabs(i32 %n, i8* %m) nounwind {
- entry:
- br i1 undef, label %bb33, label %bb1
- bb1: ; preds = %entry
- br i1 undef, label %overflow1, label %bb15
- bb15: ; preds = %bb1
- br i1 undef, label %bb33, label %bb17
- bb17: ; preds = %bb15
- br label %bb30
- bb19: ; preds = %bb30
- br i1 undef, label %bb20, label %bb29
- bb20: ; preds = %bb19
- %0 = load i32, i32* undef, align 4 ; <i32> [#uses=1]
- %1 = sub i32 %0, %n ; <i32> [#uses=1]
- br label %bb23
- bb21: ; preds = %bb23
- %2 = icmp ult i8* %q.0, %m ; <i1> [#uses=1]
- br i1 %2, label %bb22, label %overflow2
- bb22: ; preds = %bb21
- %3 = getelementptr i8, i8* %q.0, i32 1 ; <i8*> [#uses=1]
- br label %bb23
- bb23: ; preds = %bb22, %bb20
- %i.2 = phi i32 [ %1, %bb20 ], [ %4, %bb22 ] ; <i32> [#uses=1]
- %q.0 = phi i8* [ undef, %bb20 ], [ %3, %bb22 ] ; <i8*> [#uses=3]
- %4 = add i32 %i.2, -1 ; <i32> [#uses=2]
- %5 = icmp eq i32 %4, -1 ; <i1> [#uses=1]
- br i1 %5, label %bb29, label %bb21
- bb29: ; preds = %bb23, %bb19
- %q.1 = phi i8* [ undef, %bb19 ], [ %q.0, %bb23 ] ; <i8*> [#uses=0]
- br label %bb30
- bb30: ; preds = %bb29, %bb17
- br i1 undef, label %bb19, label %bb33
- overflow2: ; preds = %bb21
- br i1 undef, label %bb32, label %overflow1
- bb32: ; preds = %overflow2
- br label %overflow1
- overflow1: ; preds = %bb32, %overflow2, %bb1
- ret i8* null
- bb33: ; preds = %bb30, %bb15, %entry
- ret i8* undef
- }
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