mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-29 10:32:47 +00:00
8566963713
which branch on undef to branch on a boolean constant for the edge exiting the loop. This helps ScalarEvolution compute trip counts for loops. Teach ScalarEvolution to recognize single-value PHIs, when safe, and ForgetSymbolicName to forget such single-value PHI nodes as apprpriate in ForgetSymbolicName. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97126 91177308-0d34-0410-b5e6-96231b3b80d8
66 lines
1.2 KiB
LLVM
66 lines
1.2 KiB
LLVM
; RUN: opt < %s -S -indvars -loop-deletion -simplifycfg | FileCheck %s
|
|
; PR5794
|
|
|
|
; Indvars and loop deletion should be able to eliminate all looping
|
|
; in this testcase.
|
|
|
|
; CHECK: define i32 @pmat(i32 %m, i32 %n, double* %y) nounwind {
|
|
; CHECK-NEXT: entry:
|
|
; CHECK-NEXT: ret i32 0
|
|
; CHECK-NEXT: }
|
|
|
|
target datalayout = "e-p:64:64:64"
|
|
|
|
define i32 @pmat(i32 %m, i32 %n, double* %y) nounwind {
|
|
entry:
|
|
%cmp4 = icmp sgt i32 %m, 0
|
|
br i1 %cmp4, label %bb.n10, label %w.e12
|
|
|
|
w.c:
|
|
%cmp = icmp slt i32 %inc11, %m
|
|
br i1 %cmp, label %w.c2.p, label %w.c.w.e12c
|
|
|
|
w.c.w.e12c:
|
|
br label %w.c.w.e12c.s
|
|
|
|
w.c.w.e12c.s:
|
|
br label %w.e12
|
|
|
|
bb.n10:
|
|
%cmp51 = icmp sgt i32 %n, 0
|
|
br i1 %cmp51, label %bb.n10.w.c.w.e12c.sc, label %bb.n10.bb.n10.sc
|
|
|
|
bb.n10.bb.n10.sc:
|
|
br label %bb.n10.s
|
|
|
|
bb.n10.w.c.w.e12c.sc:
|
|
br label %w.c.w.e12c.s
|
|
|
|
bb.n10.s:
|
|
br label %w.c2.p
|
|
|
|
w.c2.p:
|
|
%i.05 = phi i32 [ 0, %bb.n10.s ], [ %inc11, %w.c ]
|
|
br i1 false, label %bb.n, label %w.e
|
|
|
|
w.c2:
|
|
br i1 undef, label %w.b6, label %w.c2.w.ec
|
|
|
|
w.c2.w.ec:
|
|
br label %w.e
|
|
|
|
bb.n:
|
|
br label %w.b6
|
|
|
|
w.b6:
|
|
br label %w.c2
|
|
|
|
w.e:
|
|
%i.08 = phi i32 [ undef, %w.c2.w.ec ], [ %i.05, %w.c2.p ]
|
|
%inc11 = add nsw i32 %i.08, 1
|
|
br label %w.c
|
|
|
|
w.e12:
|
|
ret i32 0
|
|
}
|