1; RUN: opt -passes=instcombine -S < %s | FileCheck %s 2 3target 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-n8:16:32" 4target triple = "i386-unknown-linux-gnu" 5 6@g_92 = common global [2 x ptr] zeroinitializer, align 4 ; <ptr> [#uses=1] 7@g_177 = constant ptr getelementptr (i8, ptr @g_92, i64 4), align 4 ; <ptr> [#uses=1] 8 9define i1 @PR6486() nounwind { 10; CHECK-LABEL: @PR6486( 11 %tmp = load ptr, ptr @g_177 ; <ptr> [#uses=1] 12 %cmp = icmp ne ptr null, %tmp ; <i1> [#uses=1] 13 %conv = zext i1 %cmp to i32 ; <i32> [#uses=1] 14 %cmp1 = icmp sle i32 0, %conv ; <i1> [#uses=1] 15 ret i1 %cmp1 16; CHECK: ret i1 true 17} 18 19@d = global i32 0, align 4 20@a = global [1 x i32] zeroinitializer, align 4 21 22define i1 @PR16462_1() nounwind { 23; CHECK-LABEL: @PR16462_1( 24 %cmp = icmp eq ptr @a, @d 25 %constexpr = select i1 %cmp, i32 0, i32 1 26 %constexpr1 = trunc i32 %constexpr to i16 27 %constexpr2 = sext i16 %constexpr1 to i32 28 %constexpr3 = icmp sgt i32 %constexpr2, 65535 29 ret i1 %constexpr3 30; CHECK: ret i1 false 31} 32 33define i1 @PR16462_2() nounwind { 34; CHECK-LABEL: @PR16462_2( 35 %cmp = icmp eq ptr @a, @d 36 %constexpr = select i1 %cmp, i32 0, i32 1 37 %constexpr1 = trunc i32 %constexpr to i16 38 %constexpr2 = icmp sgt i16 %constexpr1, 42 39 ret i1 %constexpr2 40; CHECK: ret i1 false 41} 42