Imported Upstream version 5.18.0.225

Former-commit-id: 10196d987d5fc5564b9d3b33b1fdf13190f4d0b5

external/llvm/test/Transforms/InstCombine/load3.ll

@@ -0,0 +1,46 @@
+; RUN: opt < %s -instcombine -S | FileCheck %s
+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-f80:128:128-n8:16:32-S128"
+target triple = "i386-apple-macosx10.0.0"
+
+; Instcombine should be able to do trivial CSE of loads.
+
+define i32 @test1(i32* %p) {
+  %t0 = getelementptr i32, i32* %p, i32 1
+  %y = load i32, i32* %t0
+  %t1 = getelementptr i32, i32* %p, i32 1
+  %x = load i32, i32* %t1
+  %a = sub i32 %y, %x
+  ret i32 %a
+; CHECK-LABEL: @test1(
+; CHECK: ret i32 0
+}
+
+
+; PR7429
+@.str = private constant [4 x i8] c"XYZ\00"
+define float @test2() {
+  %tmp = load float, float* bitcast ([4 x i8]* @.str to float*), align 1
+  ret float %tmp
+  
+; CHECK-LABEL: @test2(
+; CHECK: ret float 0x3806965600000000
+}
+
+@rslts32 = global [36 x i32] zeroinitializer, align 4
+
+@expect32 = internal constant [36 x i32][ i32 1, i32 2, i32 0, i32 100, i32 3,
+i32 4, i32 0, i32 -7, i32 4, i32 4, i32 8, i32 8, i32 1, i32 3, i32 8, i32 3,
+i32 4, i32 -2, i32 2, i32 8, i32 83, i32 77, i32 8, i32 17, i32 77, i32 88, i32
+22, i32 33, i32 44, i32 88, i32 77, i32 4, i32 4, i32 7, i32 -7, i32 -8] ,
+align 4
+
+; PR14986
+define void @test3() nounwind {
+; This is a weird way of computing zero.
+  %l = load i32, i32* getelementptr ([36 x i32], [36 x i32]* @expect32, i32 29826161, i32 28), align 4
+  store i32 %l, i32* getelementptr ([36 x i32], [36 x i32]* @rslts32, i32 29826161, i32 28), align 4
+  ret void
+
+; CHECK-LABEL: @test3(
+; CHECK: store i32 1, i32* getelementptr inbounds ([36 x i32], [36 x i32]* @rslts32, i32 0, i32 0)
+}