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llvm/test/CodeGen/PowerPC/ctrloop-s000.ll
Hal Finkel 2741d2cfdf Cleanup trip-count finding for PPC CTR loops (and some bug fixes). 
This cleans up the method used to find trip counts in order to form CTR loops on PPC.
This refactoring allows the pass to find loops which have a constant trip count but also
happen to end with a comparison to zero. This also adds explicit FIXMEs to mark two different
classes of loops that are currently ignored.

In addition, we now search through all potential induction operations instead of just the first.
Also, we check the predicate code on the conditional branch and abort the transformation if the
code is not EQ or NE, and we then make sure that the branch to be transformed matches the
condition register defined by the comparison (multiple possible comparisons will be considered).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@158607 91177308-0d34-0410-b5e6-96231b3b80d8
2012-06-16 20:34:07 +00:00

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9.4 KiB
LLVM
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; ModuleID = 'tsc_s000.c'
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-v128:128:128-n32:64"
target triple = "powerpc64-unknown-linux-gnu"
; RUN: llc < %s -march=ppc64 | FileCheck %s
@Y = common global [16000 x double] zeroinitializer, align 32
@X = common global [16000 x double] zeroinitializer, align 32
@Z = common global [16000 x double] zeroinitializer, align 32
@U = common global [16000 x double] zeroinitializer, align 32
@V = common global [16000 x double] zeroinitializer, align 32
@aa = common global [256 x [256 x double]] zeroinitializer, align 32
@bb = common global [256 x [256 x double]] zeroinitializer, align 32
@cc = common global [256 x [256 x double]] zeroinitializer, align 32
@array = common global [65536 x double] zeroinitializer, align 32
@x = common global [16000 x double] zeroinitializer, align 32
@temp = common global double 0.000000e+00, align 8
@temp_int = common global i32 0, align 4
@a = common global [16000 x double] zeroinitializer, align 32
@b = common global [16000 x double] zeroinitializer, align 32
@c = common global [16000 x double] zeroinitializer, align 32
@d = common global [16000 x double] zeroinitializer, align 32
@e = common global [16000 x double] zeroinitializer, align 32
@tt = common global [256 x [256 x double]] zeroinitializer, align 32
@indx = common global [16000 x i32] zeroinitializer, align 32
@xx = common global double* null, align 8
@yy = common global double* null, align 8
define i32 @s000() nounwind {
entry:
br label %for.cond1.preheader
for.cond1.preheader: ; preds = %for.end, %entry
%nl.010 = phi i32 [ 0, %entry ], [ %inc7, %for.end ]
br label %for.body3
for.body3: ; preds = %for.body3, %for.cond1.preheader
%indvars.iv = phi i64 [ 0, %for.cond1.preheader ], [ %indvars.iv.next.15, %for.body3 ]
%arrayidx = getelementptr inbounds [16000 x double]* @Y, i64 0, i64 %indvars.iv
%0 = load double* %arrayidx, align 32, !tbaa !0
%add = fadd double %0, 1.000000e+00
%arrayidx5 = getelementptr inbounds [16000 x double]* @X, i64 0, i64 %indvars.iv
store double %add, double* %arrayidx5, align 32, !tbaa !0
%indvars.iv.next11 = or i64 %indvars.iv, 1
%arrayidx.1 = getelementptr inbounds [16000 x double]* @Y, i64 0, i64 %indvars.iv.next11
%1 = load double* %arrayidx.1, align 8, !tbaa !0
%add.1 = fadd double %1, 1.000000e+00
%arrayidx5.1 = getelementptr inbounds [16000 x double]* @X, i64 0, i64 %indvars.iv.next11
store double %add.1, double* %arrayidx5.1, align 8, !tbaa !0
%indvars.iv.next.112 = or i64 %indvars.iv, 2
%arrayidx.2 = getelementptr inbounds [16000 x double]* @Y, i64 0, i64 %indvars.iv.next.112
%2 = load double* %arrayidx.2, align 16, !tbaa !0
%add.2 = fadd double %2, 1.000000e+00
%arrayidx5.2 = getelementptr inbounds [16000 x double]* @X, i64 0, i64 %indvars.iv.next.112
store double %add.2, double* %arrayidx5.2, align 16, !tbaa !0
%indvars.iv.next.213 = or i64 %indvars.iv, 3
%arrayidx.3 = getelementptr inbounds [16000 x double]* @Y, i64 0, i64 %indvars.iv.next.213
%3 = load double* %arrayidx.3, align 8, !tbaa !0
%add.3 = fadd double %3, 1.000000e+00
%arrayidx5.3 = getelementptr inbounds [16000 x double]* @X, i64 0, i64 %indvars.iv.next.213
store double %add.3, double* %arrayidx5.3, align 8, !tbaa !0
%indvars.iv.next.314 = or i64 %indvars.iv, 4
%arrayidx.4 = getelementptr inbounds [16000 x double]* @Y, i64 0, i64 %indvars.iv.next.314
%4 = load double* %arrayidx.4, align 32, !tbaa !0
%add.4 = fadd double %4, 1.000000e+00
%arrayidx5.4 = getelementptr inbounds [16000 x double]* @X, i64 0, i64 %indvars.iv.next.314
store double %add.4, double* %arrayidx5.4, align 32, !tbaa !0
%indvars.iv.next.415 = or i64 %indvars.iv, 5
%arrayidx.5 = getelementptr inbounds [16000 x double]* @Y, i64 0, i64 %indvars.iv.next.415
%5 = load double* %arrayidx.5, align 8, !tbaa !0
%add.5 = fadd double %5, 1.000000e+00
%arrayidx5.5 = getelementptr inbounds [16000 x double]* @X, i64 0, i64 %indvars.iv.next.415
store double %add.5, double* %arrayidx5.5, align 8, !tbaa !0
%indvars.iv.next.516 = or i64 %indvars.iv, 6
%arrayidx.6 = getelementptr inbounds [16000 x double]* @Y, i64 0, i64 %indvars.iv.next.516
%6 = load double* %arrayidx.6, align 16, !tbaa !0
%add.6 = fadd double %6, 1.000000e+00
%arrayidx5.6 = getelementptr inbounds [16000 x double]* @X, i64 0, i64 %indvars.iv.next.516
store double %add.6, double* %arrayidx5.6, align 16, !tbaa !0
%indvars.iv.next.617 = or i64 %indvars.iv, 7
%arrayidx.7 = getelementptr inbounds [16000 x double]* @Y, i64 0, i64 %indvars.iv.next.617
%7 = load double* %arrayidx.7, align 8, !tbaa !0
%add.7 = fadd double %7, 1.000000e+00
%arrayidx5.7 = getelementptr inbounds [16000 x double]* @X, i64 0, i64 %indvars.iv.next.617
store double %add.7, double* %arrayidx5.7, align 8, !tbaa !0
%indvars.iv.next.718 = or i64 %indvars.iv, 8
%arrayidx.8 = getelementptr inbounds [16000 x double]* @Y, i64 0, i64 %indvars.iv.next.718
%8 = load double* %arrayidx.8, align 32, !tbaa !0
%add.8 = fadd double %8, 1.000000e+00
%arrayidx5.8 = getelementptr inbounds [16000 x double]* @X, i64 0, i64 %indvars.iv.next.718
store double %add.8, double* %arrayidx5.8, align 32, !tbaa !0
%indvars.iv.next.819 = or i64 %indvars.iv, 9
%arrayidx.9 = getelementptr inbounds [16000 x double]* @Y, i64 0, i64 %indvars.iv.next.819
%9 = load double* %arrayidx.9, align 8, !tbaa !0
%add.9 = fadd double %9, 1.000000e+00
%arrayidx5.9 = getelementptr inbounds [16000 x double]* @X, i64 0, i64 %indvars.iv.next.819
store double %add.9, double* %arrayidx5.9, align 8, !tbaa !0
%indvars.iv.next.920 = or i64 %indvars.iv, 10
%arrayidx.10 = getelementptr inbounds [16000 x double]* @Y, i64 0, i64 %indvars.iv.next.920
%10 = load double* %arrayidx.10, align 16, !tbaa !0
%add.10 = fadd double %10, 1.000000e+00
%arrayidx5.10 = getelementptr inbounds [16000 x double]* @X, i64 0, i64 %indvars.iv.next.920
store double %add.10, double* %arrayidx5.10, align 16, !tbaa !0
%indvars.iv.next.1021 = or i64 %indvars.iv, 11
%arrayidx.11 = getelementptr inbounds [16000 x double]* @Y, i64 0, i64 %indvars.iv.next.1021
%11 = load double* %arrayidx.11, align 8, !tbaa !0
%add.11 = fadd double %11, 1.000000e+00
%arrayidx5.11 = getelementptr inbounds [16000 x double]* @X, i64 0, i64 %indvars.iv.next.1021
store double %add.11, double* %arrayidx5.11, align 8, !tbaa !0
%indvars.iv.next.1122 = or i64 %indvars.iv, 12
%arrayidx.12 = getelementptr inbounds [16000 x double]* @Y, i64 0, i64 %indvars.iv.next.1122
%12 = load double* %arrayidx.12, align 32, !tbaa !0
%add.12 = fadd double %12, 1.000000e+00
%arrayidx5.12 = getelementptr inbounds [16000 x double]* @X, i64 0, i64 %indvars.iv.next.1122
store double %add.12, double* %arrayidx5.12, align 32, !tbaa !0
%indvars.iv.next.1223 = or i64 %indvars.iv, 13
%arrayidx.13 = getelementptr inbounds [16000 x double]* @Y, i64 0, i64 %indvars.iv.next.1223
%13 = load double* %arrayidx.13, align 8, !tbaa !0
%add.13 = fadd double %13, 1.000000e+00
%arrayidx5.13 = getelementptr inbounds [16000 x double]* @X, i64 0, i64 %indvars.iv.next.1223
store double %add.13, double* %arrayidx5.13, align 8, !tbaa !0
%indvars.iv.next.1324 = or i64 %indvars.iv, 14
%arrayidx.14 = getelementptr inbounds [16000 x double]* @Y, i64 0, i64 %indvars.iv.next.1324
%14 = load double* %arrayidx.14, align 16, !tbaa !0
%add.14 = fadd double %14, 1.000000e+00
%arrayidx5.14 = getelementptr inbounds [16000 x double]* @X, i64 0, i64 %indvars.iv.next.1324
store double %add.14, double* %arrayidx5.14, align 16, !tbaa !0
%indvars.iv.next.1425 = or i64 %indvars.iv, 15
%arrayidx.15 = getelementptr inbounds [16000 x double]* @Y, i64 0, i64 %indvars.iv.next.1425
%15 = load double* %arrayidx.15, align 8, !tbaa !0
%add.15 = fadd double %15, 1.000000e+00
%arrayidx5.15 = getelementptr inbounds [16000 x double]* @X, i64 0, i64 %indvars.iv.next.1425
store double %add.15, double* %arrayidx5.15, align 8, !tbaa !0
%indvars.iv.next.15 = add i64 %indvars.iv, 16
%lftr.wideiv.15 = trunc i64 %indvars.iv.next.15 to i32
%exitcond.15 = icmp eq i32 %lftr.wideiv.15, 16000
br i1 %exitcond.15, label %for.end, label %for.body3
for.end: ; preds = %for.body3
%call = tail call i32 @dummy(double* getelementptr inbounds ([16000 x double]* @X, i64 0, i64 0), double* getelementptr inbounds ([16000 x double]* @Y, i64 0, i64 0), double* getelementptr inbounds ([16000 x double]* @Z, i64 0, i64 0), double* getelementptr inbounds ([16000 x double]* @U, i64 0, i64 0), double* getelementptr inbounds ([16000 x double]* @V, i64 0, i64 0), [256 x double]* getelementptr inbounds ([256 x [256 x double]]* @aa, i64 0, i64 0), [256 x double]* getelementptr inbounds ([256 x [256 x double]]* @bb, i64 0, i64 0), [256 x double]* getelementptr inbounds ([256 x [256 x double]]* @cc, i64 0, i64 0), double 0.000000e+00) nounwind
%inc7 = add nsw i32 %nl.010, 1
%exitcond = icmp eq i32 %inc7, 400000
br i1 %exitcond, label %for.end8, label %for.cond1.preheader
for.end8: ; preds = %for.end
ret i32 0
; CHECK: @s000
; CHECK: mtctr
; CHECK: bdnz
}
declare i32 @dummy(double*, double*, double*, double*, double*, [256 x double]*, [256 x double]*, [256 x double]*, double)
!0 = metadata !{metadata !"double", metadata !1}
!1 = metadata !{metadata !"omnipotent char", metadata !2}
!2 = metadata !{metadata !"Simple C/C++ TBAA"}
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