diff options
Diffstat (limited to 'test/Transforms/TailCallElim/reorder_load.ll')
| -rw-r--r-- | test/Transforms/TailCallElim/reorder_load.ll | 27 |
1 files changed, 23 insertions, 4 deletions
diff --git a/test/Transforms/TailCallElim/reorder_load.ll b/test/Transforms/TailCallElim/reorder_load.ll index 53c65da..2e350d6 100644 --- a/test/Transforms/TailCallElim/reorder_load.ll +++ b/test/Transforms/TailCallElim/reorder_load.ll @@ -1,6 +1,8 @@ ; RUN: opt < %s -tailcallelim -S | FileCheck %s ; PR4323 +target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" + ; Several cases where tail call elimination should move the load above the call, ; then eliminate the tail recursion. @@ -12,6 +14,11 @@ ; This load can be moved above the call because the function won't write to it ; and the call has no side effects. define fastcc i32 @raise_load_1(i32* %a_arg, i32 %a_len_arg, i32 %start_arg) nounwind readonly { +; CHECK-LABEL: @raise_load_1( +; CHECK-NOT: call +; CHECK: load i32* +; CHECK-NOT: call +; CHECK: } entry: %tmp2 = icmp sge i32 %start_arg, %a_len_arg ; <i1> [#uses=1] br i1 %tmp2, label %if, label %else @@ -21,7 +28,6 @@ if: ; preds = %entry else: ; preds = %entry %tmp7 = add i32 %start_arg, 1 ; <i32> [#uses=1] -; CHECK-NOT: call %tmp8 = call fastcc i32 @raise_load_1(i32* %a_arg, i32 %a_len_arg, i32 %tmp7) ; <i32> [#uses=1] %tmp9 = load i32* %a_arg ; <i32> [#uses=1] %tmp10 = add i32 %tmp9, %tmp8 ; <i32> [#uses=1] @@ -32,6 +38,11 @@ else: ; preds = %entry ; This load can be moved above the call because the function won't write to it ; and the load provably can't trap. define fastcc i32 @raise_load_2(i32* %a_arg, i32 %a_len_arg, i32 %start_arg) readonly { +; CHECK-LABEL: @raise_load_2( +; CHECK-NOT: call +; CHECK: load i32* +; CHECK-NOT: call +; CHECK: } entry: %tmp2 = icmp sge i32 %start_arg, %a_len_arg ; <i1> [#uses=1] br i1 %tmp2, label %if, label %else @@ -48,7 +59,6 @@ unwind: ; preds = %else recurse: ; preds = %else %tmp7 = add i32 %start_arg, 1 ; <i32> [#uses=1] -; CHECK-NOT: call %tmp8 = call fastcc i32 @raise_load_2(i32* %a_arg, i32 %a_len_arg, i32 %tmp7) ; <i32> [#uses=1] %tmp9 = load i32* @global ; <i32> [#uses=1] %tmp10 = add i32 %tmp9, %tmp8 ; <i32> [#uses=1] @@ -59,6 +69,11 @@ recurse: ; preds = %else ; This load can be safely moved above the call (even though it's from an ; extern_weak global) because the call has no side effects. define fastcc i32 @raise_load_3(i32* %a_arg, i32 %a_len_arg, i32 %start_arg) nounwind readonly { +; CHECK-LABEL: @raise_load_3( +; CHECK-NOT: call +; CHECK: load i32* +; CHECK-NOT: call +; CHECK: } entry: %tmp2 = icmp sge i32 %start_arg, %a_len_arg ; <i1> [#uses=1] br i1 %tmp2, label %if, label %else @@ -68,7 +83,6 @@ if: ; preds = %entry else: ; preds = %entry %tmp7 = add i32 %start_arg, 1 ; <i32> [#uses=1] -; CHECK-NOT: call %tmp8 = call fastcc i32 @raise_load_3(i32* %a_arg, i32 %a_len_arg, i32 %tmp7) ; <i32> [#uses=1] %tmp9 = load i32* @extern_weak_global ; <i32> [#uses=1] %tmp10 = add i32 %tmp9, %tmp8 ; <i32> [#uses=1] @@ -80,6 +94,12 @@ else: ; preds = %entry ; unknown pointer (which normally means it might trap) because the first load ; proves it doesn't trap. define fastcc i32 @raise_load_4(i32* %a_arg, i32 %a_len_arg, i32 %start_arg) readonly { +; CHECK-LABEL: @raise_load_4( +; CHECK-NOT: call +; CHECK: load i32* +; CHECK-NEXT: load i32* +; CHECK-NOT: call +; CHECK: } entry: %tmp2 = icmp sge i32 %start_arg, %a_len_arg ; <i1> [#uses=1] br i1 %tmp2, label %if, label %else @@ -97,7 +117,6 @@ unwind: ; preds = %else recurse: ; preds = %else %tmp7 = add i32 %start_arg, 1 ; <i32> [#uses=1] %first = load i32* %a_arg ; <i32> [#uses=1] -; CHECK-NOT: call %tmp8 = call fastcc i32 @raise_load_4(i32* %a_arg, i32 %first, i32 %tmp7) ; <i32> [#uses=1] %second = load i32* %a_arg ; <i32> [#uses=1] %tmp10 = add i32 %second, %tmp8 ; <i32> [#uses=1] |