align-2d-gep.ll
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -instcombine -S | FileCheck %s
target datalayout = "E-p:64:64:64-a0:0:8-f32:32:32-f64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-v64:64:64-v128:128:128"
; A multi-dimensional array in a nested loop doing vector stores that
; aren't yet aligned. Instcombine can understand the addressing in the
; Nice case to prove 16 byte alignment. In the Awkward case, the inner
; array dimension is not even, so the stores to it won't always be
; aligned. Instcombine should prove alignment in exactly one of the two
; stores.
@Nice = global [1001 x [20000 x double]] zeroinitializer, align 32
@Awkward = global [1001 x [20001 x double]] zeroinitializer, align 32
define void @foo() nounwind {
; CHECK-LABEL: @foo(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[BB7_OUTER:%.*]]
; CHECK: bb7.outer:
; CHECK-NEXT: [[I:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[INDVAR_NEXT26:%.*]], [[BB11:%.*]] ]
; CHECK-NEXT: br label [[BB1:%.*]]
; CHECK: bb1:
; CHECK-NEXT: [[J:%.*]] = phi i64 [ 0, [[BB7_OUTER]] ], [ [[INDVAR_NEXT:%.*]], [[BB1]] ]
; CHECK-NEXT: [[T4:%.*]] = getelementptr [1001 x [20000 x double]], [1001 x [20000 x double]]* @Nice, i64 0, i64 [[I]], i64 [[J]]
; CHECK-NEXT: [[Q:%.*]] = bitcast double* [[T4]] to <2 x double>*
; CHECK-NEXT: store <2 x double> zeroinitializer, <2 x double>* [[Q]], align 16
; CHECK-NEXT: [[S4:%.*]] = getelementptr [1001 x [20001 x double]], [1001 x [20001 x double]]* @Awkward, i64 0, i64 [[I]], i64 [[J]]
; CHECK-NEXT: [[R:%.*]] = bitcast double* [[S4]] to <2 x double>*
; CHECK-NEXT: store <2 x double> zeroinitializer, <2 x double>* [[R]], align 8
; CHECK-NEXT: [[INDVAR_NEXT]] = add i64 [[J]], 2
; CHECK-NEXT: [[EXITCOND:%.*]] = icmp eq i64 [[INDVAR_NEXT]], 556
; CHECK-NEXT: br i1 [[EXITCOND]], label [[BB11]], label [[BB1]]
; CHECK: bb11:
; CHECK-NEXT: [[INDVAR_NEXT26]] = add i64 [[I]], 1
; CHECK-NEXT: [[EXITCOND27:%.*]] = icmp eq i64 [[INDVAR_NEXT26]], 991
; CHECK-NEXT: br i1 [[EXITCOND27]], label [[RETURN_SPLIT:%.*]], label [[BB7_OUTER]]
; CHECK: return.split:
; CHECK-NEXT: ret void
;
entry:
br label %bb7.outer
bb7.outer:
%i = phi i64 [ 0, %entry ], [ %indvar.next26, %bb11 ]
br label %bb1
bb1:
%j = phi i64 [ 0, %bb7.outer ], [ %indvar.next, %bb1 ]
%t4 = getelementptr [1001 x [20000 x double]], [1001 x [20000 x double]]* @Nice, i64 0, i64 %i, i64 %j
%q = bitcast double* %t4 to <2 x double>*
store <2 x double><double 0.0, double 0.0>, <2 x double>* %q, align 8
%s4 = getelementptr [1001 x [20001 x double]], [1001 x [20001 x double]]* @Awkward, i64 0, i64 %i, i64 %j
%r = bitcast double* %s4 to <2 x double>*
store <2 x double><double 0.0, double 0.0>, <2 x double>* %r, align 8
%indvar.next = add i64 %j, 2
%exitcond = icmp eq i64 %indvar.next, 556
br i1 %exitcond, label %bb11, label %bb1
bb11:
%indvar.next26 = add i64 %i, 1
%exitcond27 = icmp eq i64 %indvar.next26, 991
br i1 %exitcond27, label %return.split, label %bb7.outer
return.split:
ret void
}