test case for IV-Users simplification loop improvement

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90260 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 128 insertions, 0 deletions

diff --git a/test/CodeGen/Thumb2/2009-12-01-LoopIVUsers.ll b/test/CodeGen/Thumb2/2009-12-01-LoopIVUsers.ll
new file mode 100644
index 0000000000..79ad0a9126
--- /dev/null
+++ b/test/CodeGen/Thumb2/2009-12-01-LoopIVUsers.ll
@@ -0,0 +1,128 @@
+; RUN: opt < %s -std-compile-opts | \
+; RUN:   llc -mtriple=thumbv7-apple-darwin10 -mattr=+neon | FileCheck %s
+
+define arm_apcscc void @fred(i32 %three_by_three, i8* %in, double %dt1, i32 %x_size, i32 %y_size, i8* %bp) nounwind {
+entry:
+; -- The loop following the load should only use a single add-literation
+;    instruction.
+; CHECK: ldr.64
+; CHECK: adds r{{[0-9]+}}, #1
+; CHECK-NOT: adds r{{[0-9]+}}, #1
+; CHECK: subsections_via_symbols
+
+
+  %three_by_three_addr = alloca i32               ; <i32*> [#uses=2]
+  %in_addr = alloca i8*                           ; <i8**> [#uses=2]
+  %dt_addr = alloca float                         ; <float*> [#uses=4]
+  %x_size_addr = alloca i32                       ; <i32*> [#uses=2]
+  %y_size_addr = alloca i32                       ; <i32*> [#uses=1]
+  %bp_addr = alloca i8*                           ; <i8**> [#uses=1]
+  %tmp_image = alloca i8*                         ; <i8**> [#uses=0]
+  %out = alloca i8*                               ; <i8**> [#uses=1]
+  %cp = alloca i8*                                ; <i8**> [#uses=0]
+  %dpt = alloca i8*                               ; <i8**> [#uses=4]
+  %dp = alloca i8*                                ; <i8**> [#uses=2]
+  %ip = alloca i8*                                ; <i8**> [#uses=0]
+  %centre = alloca i32                            ; <i32*> [#uses=0]
+  %tmp = alloca i32                               ; <i32*> [#uses=0]
+  %brightness = alloca i32                        ; <i32*> [#uses=0]
+  %area = alloca i32                              ; <i32*> [#uses=0]
+  %y = alloca i32                                 ; <i32*> [#uses=0]
+  %x = alloca i32                                 ; <i32*> [#uses=2]
+  %j = alloca i32                                 ; <i32*> [#uses=6]
+  %i = alloca i32                                 ; <i32*> [#uses=1]
+  %mask_size = alloca i32                         ; <i32*> [#uses=5]
+  %increment = alloca i32                         ; <i32*> [#uses=1]
+  %n_max = alloca i32                             ; <i32*> [#uses=4]
+  %temp = alloca float                            ; <float*> [#uses=1]
+  %"alloca point" = bitcast i32 0 to i32          ; <i32> [#uses=0]
+  store i32 %three_by_three, i32* %three_by_three_addr
+  store i8* %in, i8** %in_addr
+  %dt = fptrunc double %dt1 to float              ; <float> [#uses=1]
+  store float %dt, float* %dt_addr
+  store i32 %x_size, i32* %x_size_addr
+  store i32 %y_size, i32* %y_size_addr
+  store i8* %bp, i8** %bp_addr
+  %0 = load i8** %in_addr, align 4                ; <i8*> [#uses=1]
+  store i8* %0, i8** %out, align 4
+  %1 = call arm_apcscc  i32 (...)* @foo() nounwind ; <i32> [#uses=1]
+  store i32 %1, i32* %i, align 4
+  %2 = load i32* %three_by_three_addr, align 4    ; <i32> [#uses=1]
+  %3 = icmp eq i32 %2, 0                          ; <i1> [#uses=1]
+  br i1 %3, label %bb, label %bb2
+
+bb:                                               ; preds = %entry
+  %4 = load float* %dt_addr, align 4              ; <float> [#uses=1]
+  %5 = fpext float %4 to double                   ; <double> [#uses=1]
+  %6 = fmul double %5, 1.500000e+00               ; <double> [#uses=1]
+  %7 = fptosi double %6 to i32                    ; <i32> [#uses=1]
+  %8 = add nsw i32 %7, 1                          ; <i32> [#uses=1]
+  store i32 %8, i32* %mask_size, align 4
+  br label %bb3
+
+bb2:                                              ; preds = %entry
+  store i32 1, i32* %mask_size, align 4
+  br label %bb3
+
+bb3:                                              ; preds = %bb2, %bb
+  %9 = load i32* %mask_size, align 4              ; <i32> [#uses=1]
+  %10 = mul i32 %9, 2                             ; <i32> [#uses=1]
+  %11 = add nsw i32 %10, 1                        ; <i32> [#uses=1]
+  store i32 %11, i32* %n_max, align 4
+  %12 = load i32* %x_size_addr, align 4           ; <i32> [#uses=1]
+  %13 = load i32* %n_max, align 4                 ; <i32> [#uses=1]
+  %14 = sub i32 %12, %13                          ; <i32> [#uses=1]
+  store i32 %14, i32* %increment, align 4
+  %15 = load i32* %n_max, align 4                 ; <i32> [#uses=1]
+  %16 = load i32* %n_max, align 4                 ; <i32> [#uses=1]
+  %17 = mul i32 %15, %16                          ; <i32> [#uses=1]
+  %18 = call arm_apcscc  noalias i8* @malloc(i32 %17) nounwind ; <i8*> [#uses=1]
+  store i8* %18, i8** %dp, align 4
+  %19 = load i8** %dp, align 4                    ; <i8*> [#uses=1]
+  store i8* %19, i8** %dpt, align 4
+  %20 = load float* %dt_addr, align 4             ; <float> [#uses=1]
+  %21 = load float* %dt_addr, align 4             ; <float> [#uses=1]
+  %22 = fmul float %20, %21                       ; <float> [#uses=1]
+  %23 = fsub float -0.000000e+00, %22             ; <float> [#uses=1]
+  store float %23, float* %temp, align 4
+  %24 = load i32* %mask_size, align 4             ; <i32> [#uses=1]
+  %25 = sub i32 0, %24                            ; <i32> [#uses=1]
+  store i32 %25, i32* %j, align 4
+  br label %bb5
+
+bb4:                                              ; preds = %bb5
+  %26 = load i32* %j, align 4                     ; <i32> [#uses=1]
+  %27 = load i32* %j, align 4                     ; <i32> [#uses=1]
+  %28 = mul i32 %26, %27                          ; <i32> [#uses=1]
+  %29 = sitofp i32 %28 to double                  ; <double> [#uses=1]
+  %30 = fmul double %29, 1.234000e+00             ; <double> [#uses=1]
+  %31 = fptosi double %30 to i32                  ; <i32> [#uses=1]
+  store i32 %31, i32* %x, align 4
+  %32 = load i32* %x, align 4                     ; <i32> [#uses=1]
+  %33 = trunc i32 %32 to i8                       ; <i8> [#uses=1]
+  %34 = load i8** %dpt, align 4                   ; <i8*> [#uses=1]
+  store i8 %33, i8* %34, align 1
+  %35 = load i8** %dpt, align 4                   ; <i8*> [#uses=1]
+  %36 = getelementptr inbounds i8* %35, i64 1     ; <i8*> [#uses=1]
+  store i8* %36, i8** %dpt, align 4
+  %37 = load i32* %j, align 4                     ; <i32> [#uses=1]
+  %38 = add nsw i32 %37, 1                        ; <i32> [#uses=1]
+  store i32 %38, i32* %j, align 4
+  br label %bb5
+
+bb5:                                              ; preds = %bb4, %bb3
+  %39 = load i32* %j, align 4                     ; <i32> [#uses=1]
+  %40 = load i32* %mask_size, align 4             ; <i32> [#uses=1]
+  %41 = icmp sle i32 %39, %40                     ; <i1> [#uses=1]
+  br i1 %41, label %bb4, label %bb6
+
+bb6:                                              ; preds = %bb5
+  br label %return
+
+return:                                           ; preds = %bb6
+  ret void
+}
+
+declare arm_apcscc i32 @foo(...)
+
+declare arm_apcscc noalias i8* @malloc(i32) nounwind