diff options
Diffstat (limited to 'test/CodeGen/X86/iv-users-in-other-loops.ll')
| -rw-r--r-- | test/CodeGen/X86/iv-users-in-other-loops.ll | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/test/CodeGen/X86/iv-users-in-other-loops.ll b/test/CodeGen/X86/iv-users-in-other-loops.ll index 8385a29..8f79fb8 100644 --- a/test/CodeGen/X86/iv-users-in-other-loops.ll +++ b/test/CodeGen/X86/iv-users-in-other-loops.ll @@ -1,4 +1,4 @@ -; RUN: llc < %s -march=x86-64 -o %t +; RUN: llc < %s -march=x86-64 -enable-lsr-nested -o %t ; RUN: not grep inc %t ; RUN: grep dec %t | count 2 ; RUN: grep addq %t | count 12 @@ -11,6 +11,10 @@ ; to insert new induction variables. Previously it would create a ; flood of new induction variables. ; Also, the loop reversal should kick in once. +; +; In this example, performing LSR on the entire loop nest, +; as opposed to only the inner loop can further reduce induction variables, +; and their related instructions and registers. target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128" target triple = "x86_64-unknown-linux-gnu" |
