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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -passes=instcombine -S | FileCheck %s
target datalayout = "E-p:64:64:64-p1:32:32:32-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"
; Instcombine should be able to prove vector alignment in the
; presence of a few mild address computation tricks.
define void @test0(ptr %b, i64 %n, i64 %u, i64 %y) nounwind {
; CHECK-LABEL: @test0(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[C:%.*]] = ptrtoint ptr [[B:%.*]] to i64
; CHECK-NEXT: [[D:%.*]] = and i64 [[C]], -16
; CHECK-NEXT: [[E:%.*]] = inttoptr i64 [[D]] to ptr
; CHECK-NEXT: [[V:%.*]] = shl i64 [[U:%.*]], 1
; CHECK-NEXT: [[Z:%.*]] = and i64 [[Y:%.*]], -2
; CHECK-NEXT: [[T1421:%.*]] = icmp eq i64 [[N:%.*]], 0
; CHECK-NEXT: br i1 [[T1421]], label [[RETURN:%.*]], label [[BB:%.*]]
; CHECK: bb:
; CHECK-NEXT: [[I:%.*]] = phi i64 [ [[INDVAR_NEXT:%.*]], [[BB]] ], [ 20, [[ENTRY:%.*]] ]
; CHECK-NEXT: [[J:%.*]] = mul i64 [[I]], [[V]]
; CHECK-NEXT: [[H:%.*]] = add i64 [[J]], [[Z]]
; CHECK-NEXT: [[T8:%.*]] = getelementptr double, ptr [[E]], i64 [[H]]
; CHECK-NEXT: store <2 x double> zeroinitializer, ptr [[T8]], align 16
; CHECK-NEXT: [[INDVAR_NEXT]] = add i64 [[I]], 1
; CHECK-NEXT: [[EXITCOND:%.*]] = icmp eq i64 [[INDVAR_NEXT]], [[N]]
; CHECK-NEXT: br i1 [[EXITCOND]], label [[RETURN]], label [[BB]]
; CHECK: return:
; CHECK-NEXT: ret void
;
entry:
%c = ptrtoint ptr %b to i64
%d = and i64 %c, -16
%e = inttoptr i64 %d to ptr
%v = mul i64 %u, 2
%z = and i64 %y, -2
%t1421 = icmp eq i64 %n, 0
br i1 %t1421, label %return, label %bb
bb:
%i = phi i64 [ %indvar.next, %bb ], [ 20, %entry ]
%j = mul i64 %i, %v
%h = add i64 %j, %z
%t8 = getelementptr double, ptr %e, i64 %h
store <2 x double><double 0.0, double 0.0>, ptr %t8, align 8
%indvar.next = add i64 %i, 1
%exitcond = icmp eq i64 %indvar.next, %n
br i1 %exitcond, label %return, label %bb
return:
ret void
}
; When we see a unaligned load from an insufficiently aligned global or
; alloca, increase the alignment of the load, turning it into an aligned load.
@GLOBAL = internal global [4 x i32] zeroinitializer
define <16 x i8> @test1(<2 x i64> %x) {
; CHECK-LABEL: @test1(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[TMP:%.*]] = load <16 x i8>, ptr @GLOBAL, align 16
; CHECK-NEXT: ret <16 x i8> [[TMP]]
;
entry:
%tmp = load <16 x i8>, ptr @GLOBAL, align 1
ret <16 x i8> %tmp
}
@GLOBAL_as1 = internal addrspace(1) global [4 x i32] zeroinitializer
define <16 x i8> @test1_as1(<2 x i64> %x) {
; CHECK-LABEL: @test1_as1(
; CHECK-NEXT: [[TMP:%.*]] = load <16 x i8>, ptr addrspace(1) @GLOBAL_as1, align 16
; CHECK-NEXT: ret <16 x i8> [[TMP]]
;
%tmp = load <16 x i8>, ptr addrspace(1) @GLOBAL_as1, align 1
ret <16 x i8> %tmp
}
@GLOBAL_as1_gep = internal addrspace(1) global [8 x i32] zeroinitializer
define <16 x i8> @test1_as1_gep(<2 x i64> %x) {
; CHECK-LABEL: @test1_as1_gep(
; CHECK-NEXT: [[TMP:%.*]] = load <16 x i8>, ptr addrspace(1) getelementptr inbounds ([8 x i32], ptr addrspace(1) @GLOBAL_as1_gep, i32 0, i32 4), align 16
; CHECK-NEXT: ret <16 x i8> [[TMP]]
;
%tmp = load <16 x i8>, ptr addrspace(1) getelementptr ([8 x i32], ptr addrspace(1) @GLOBAL_as1_gep, i16 0, i16 4), align 1
ret <16 x i8> %tmp
}
; When a load or store lacks an explicit alignment, add one.
define double @test2(ptr %p, double %n) nounwind {
; CHECK-LABEL: @test2(
; CHECK-NEXT: [[T:%.*]] = load double, ptr [[P:%.*]], align 8
; CHECK-NEXT: store double [[N:%.*]], ptr [[P]], align 8
; CHECK-NEXT: ret double [[T]]
;
%t = load double, ptr %p
store double %n, ptr %p
ret double %t
}
declare void @llvm.memset.p0.i64(ptr nocapture, i8, i64, i1) nounwind
declare void @use(ptr)
%struct.s = type { i32, i32, i32, i32 }
define void @test3(ptr sret(%struct.s) %a4) {
; Check that the alignment is bumped up the alignment of the sret type.
; CHECK-LABEL: @test3(
; CHECK-NEXT: call void @llvm.memset.p0.i64(ptr noundef nonnull align 4 dereferenceable(16) [[A4:%.*]], i8 0, i64 16, i1 false)
; CHECK-NEXT: call void @use(ptr [[A4]])
; CHECK-NEXT: ret void
;
call void @llvm.memset.p0.i64(ptr %a4, i8 0, i64 16, i1 false)
call void @use(ptr %a4)
ret void
}
|
